INTRODUCING THE 

Thomson and Howe Energy Systems Inc. 1987 CATALOG

CATALOG INDEX

1997 US Price List

GOVERNOR SECTION:

Governor Selection Guide
Product "J" Junior
Product "A2" Dual Triac
Product "K2" Dual Triac, Higher Voltage
Product "LCX" High Capacity
Product "G" Hydrid Water & Load Control
Product "I" Hydraulic Synchronizing Governor

GOVERNING ACCESSORIES SECTION:

Product "C" Hydro Load Management
Product "CM" Diesel Load Management
Product "C2" Domestic Load Management
Product "Dl" 15 AMP Relay
Product "D2" 30 Amp Relay
Product "D3" Dual 30 AMP Relay
Product "D4" Quad 20 AMP Relay
Product "D5" Mechanical High Voltage Relay
Product "Ml" Six Element Load Dump Tank
Product "M2" Twelve Element Load Dump Tank
Product "E" Frequency Guard
Product "F" Portable Power Monitor

CONTROL SECTION:

Product "H" Induction Intertie
Product "I" Synchronous Intertie
Product "L" Plant Controller
Product "LT" Head Level Transmitter
Product "N" D.C. Priority Manager

MANUAL SECTION:

PRODUCT “A2” INSTALLATION AND OPERATION MANUAL VERSION 0.3, JANUARY 2002

THOMSON AND HOWE ENERGY SYSTEMS INC. is still THE source for highly advanced, standardized small hydro control equipment. We have consolidated our position as the prime world-wide source for small hydro load control governing equipment since the last catalog, but we are still improving these products and developing new ones. Our continuing commitment to research and development still ensures that our customers receive the best and most cost effective state-of-the-art devices. We believe that standardization of equipment is still the best way to eliminate high cost for custom engineering. See by the following product list, the results of our R & D effort over the last two years:

PRODUCT/CATALOG CHANGES SINCE 1987

A2: New product, designed from the "A"'s old dual triac options, but with a special firing algorithm to reduce waveform distortion.

CM: New product, allows load management to be used on diesel plants.

C2: New product, inexpensive domestic load management, a product "C" in an aluminum case complete with two 20 amp relays.

D: New relays - single 15 amp solid state relay, single 20 amp solid state relay, dual 30 amp solid state relays, quad 20 amp solid state relay.

E: New look meter. Audible alarm option.

F: Now has metal desk-top case with indicating lights and new loud/soft adjustable alarm.

G: New SCR design, higher power, better performance.

H: Complete induction switchgear panels now available.

I: New product - A combined water control governor and turbine controller in one package, for intertied synchronous generators not to be run as stand-alone units.

J: 50 Hertz option now available, heavy duty packages available.

K2: New product. Up to 140% more capacity than a product "K".

L: New product. Level controller for up to three turbines.

LT: New Product. Inexpensive, directly submersed, 4-20 MA 2 wire type depth transducer/transmitter.

LCX: New product. This is the load governor design we now use where power requirements are beyond the "G" and "K" lines.

M: New product - stainless steel immersion heater tank units.

OTHER CHANGES:

The product "B" digital retrofit kit is now available as a rebuild service for owners of older analog governors, built before 1984. The product "LCG" and also previous load control only options for the ''G'' governor are now superceded by the "LCX" and the "K2". The product "A" dual triac option is superceded by the "A2". The old "L" design is superceded by the new, completely revised "L" design.

GOVERNORS

GOVERNOR SELECTION GUIDE: (INDEX)

NOTE: Some selections are made using total load current instead of Kilowatts. To calculate total load current, simply divide plant kilowatt output by the generator voltage, then multiply the result by 1000.

If this guide is not helpful to you, just phone or write us and we will be pleased to select the governor that is best for your installation.

l. GOVERNORS TO BE USED ON NON-STORAGE SITES
WITHOUT CONNECTION TO A UTILITY GRID.

a. SINGLE PHASE, 240 VOLTS:

i. Smaller than 4 KW - choose an ''A2", ''A'', or "J'' The ''A2'' works best, the "J'' is least
expensive.
ii. Between 4 KW and 16 KW - choose an "A2'', or an ''A'' with a minimum of two relays
iii. Between 16 KW and 75 KW - choose an 'A2'', or ''A'', plus additional relays.
iv. Between 75 KW and 150 KW - choose an "A2'' plus additional relays
v. Larger than 150 KW - Special designs available.

b. THREE PHASE, 208 OR 240 VOLTS:

i. Smaller than 24 KW - choose an "A'' plus four relays
ii. Between 24 KW and 48 KW - choose an "A2'' plus four relays
iii. Between 48 KW and 150 KW - choose an "A2", plus additional relays
iv. Larger than 150 KW - Special designs available.

c. THREE PHASE, 277 TO 600 VOLTS:

i. Smaller than 120 amps load current - choose a "K"
ii. Between 120 and 240 amps load current - choose a "K2"
iii. Between 240 and 300 amps load current choose a ''K2'' with the heavy-duty option.
iv. Between 300 amps and 500 amps - choose a "K2" with additional external relays or a "LCX''
v. Above 500 amps - choose a "LCX"

2. GOVERNORS TO BE USED ON STORAGE SITES WHERE WATER IS TO BE STORED FOR FUTURE USE WHEN POSSIBLE. NO CONNECTION TO A UTILITY GRID.

a. 240 VOLTS OR LESS:

i. Choose a product ''A'' or ''A2'' with a water control option

b. 277 TO 600 VOLTS:

i. Choose a product ''G'' or a ''LCX'' with a water control option.

3. GOVERNORS USED FOR SITES THAT REQUIRE FULL SPEED GOVERNING. AND WILL BE REQUIRED TO OPERATE CONNECTED TO A UTILITY.
a. LESS THAN 150 AMPS LOAD CURRENT AT 600 VOLTS OR LESS:

i. Choose a ''G'' (no water control needed)

b. GREATER THAN 150 AMPS AT 600 VOLTS OR AND WHERE PROVIDING WATER CONTROL TO A GOVERNOR IS DIFFICULT:
i. Choose a "LCX'' (no water control needed)

c. GREATER THAN 150 AMPS LOAD CURRENT OR GREATER THAN 600 VOLTS:
i. Choose a ''G'' (water control used, transformers may be required to drop voltage to 600 volts maxi mum for product ''G'' supply)
4. GOVERNORS USED FOR SITES THAT WILL REQUIRE GOVERNING IN ORDER TO SYNCHRONIZE TO THE UTILITY ONLY. THESE PLANTS ALWAYS OPERATE WHILE CONNECTED TO A UTILITY.
a. LESS THAN 150 AMPS LOAD CURRENT AT 600 VOLTS OR LESS:
i. Choose a "G'' (no water control needed)

b. GREATER THAN 150 AMPS AT 600 VOLTS OR LESS AND WHERE PROVIDING WATER CONTROL TO A GOVERNOR IS DIFFICULT:
i. Choose a "LCX" (no water control needed)

c. GREATER THAN 150 AMPS LOAD CURRENT OR GREATER THAN 600 VOLTS:

i. Choose an "I'' (no load control used)

1997 GOVERNOR PRODUCTS

PRODUCT "J" - "JUNIOR" THOMSON AND HOWE ANALOG STYLE LOAD CONTROL GOVERNOR(INDEX)

PURPOSE

1. Provide 60 Hertz governing (optionally 50 hertz) for single phase synchronous A.C. hydro-electric generators where minimal cost is of paramount importance. 2. Provide an inexpensive introduction to T.H.E.S. governor products.
REQUIREMENTS FOR USE
l. Stand-alone synchronous generator. 2. Single phase. 3. Less than 4000 watts at 240 volts or 2000 watts at 120 volts.

DESCRIPTION
The "JUNIOR" is a true, analog type, frequency monitor ing governor. The "JUNIOR" is housed in an single ventilated steel enclosure weighing 6 pounds (2.3 Kilo grams). The enclosure is 10 inches wide by 6 inches high by 6 inches deep. Two knock-outs facilitate wiring. There is an internal terminal strip with four terminals for power supply- and load connections. The "JUNIOR" is usually supplied wired for 240 volt operation, but can be field modified for 120 volt operation.
OPTIONS:
1. 120 volt option for smaller plants, reduces all maximum wattage capacities by half. (no charge).
2. 50 Hertz calibration. (no charge).
3. Extra copies, installation and operational manual.
4. Export type heavy duty power package.

FOR MORE INFORMATION
Order an installation/operation manual for $4.00 U.S. or $5.00 Canadian.

PRODUCT "A2" - DUAL TRIAC THOMSON AND HOWE MICRO-COMPUTER LOAD CONTROL GOVERNOR(INDEX)

Product ''A2'' - Our currently best selling governor, see Product 'A'' picture for appearance.

PURPOSE
1. The product ''A2 provides more convenient power control for systems of from 30 KW to 150 KW due to its increased load control capacity beyond the product "A".

2. The product "A2" uses two triacs fired sequentially to reduce waveform distortion. The reduction is sufficient that no relays are required for governing single phase systems of less than 16 KW. Relay control is still used for load management purposes, greater capacity, or for three phase systems.

REQUIREMENTS FOR USE 1. Stand-alone systems of from I to 150 KW generation. 2. 120, 220 or 240 volt single phase, 208 volt three phase I wire, 240 volt three phase 3 wire, 380 or 416 volt three phase 4 wire.
OTHER DETAILS Identical to product "A'' specifications above except for: increased capability; No relays are required for single phase system6 below 16 KW.

PRODUCT ''K2'1 - DUAL TRIAC HIGHER VOLTAGE THOMSON AND HOWE MICRO-COMPUTER LOAD CONTROL GOVERNOR(INDEX)

See Product "K2" for pictures and Complete Description

PURPOSE
1. Provides twice the load control capacity of a product
"K" . 2. Reduces waveform distortion below even the product"K" .
REQUIREMENTS FOR USE
1. Stand-alone three phase systems hydro generators.
2. 208, 380, 416, 480, 600 volts. Specify when ordering.

OTHER DETAILS
The details for the product "K2" are identical to the product ''K", except for twice the load control capacity.

OPTIONS
1-5. All options available for the product ''K".
6. A heavy-duty option that increases power capability to:
208 volts - 60 KW
240 volts - 70 KW
380 volts - 110 KW
480 volts - 140 KW
600 volts - 180 KW


PRODUCT "LCX" - HIGH CAPACITY THOMSON AND HOWE MICRO-COM PUTER LOAD CONTROL GOVERNOR (INDEX)

PURPOSE
1. Provides 60 Hertz or optionally 50 Hertz governing at higher load control capacities than any other T.H.E.S. governor.
2. 3 phase SCR firing and 3 pole relays provide balanced 3 phase load control.
3. Provides full interfacing to auto-synchronizers

REQUIREMENTS FOR USE
1. Stand-alone systems larger than about 75 KW.
2. Generating voltage from 277 to 600 volts. or higher.

DESCRIPTION
Since this is an open-ended product, there are many "LCX'' arrangements, the voltage and power to be controlled will determine the size of cabinet. The smallest cabinet used (pictured above) is 16 inches wide by 24 inches high by 8 inches deep. All designs provide a frequency meter and a load meter as well as lights that indicate the status of the various outputs. The computer used in all designs is identical. Besides a minimum of six high power silicon controlled rectifiers, a number of 3 pole relays are usually used, the required number of these relays may vary from zero to twelve, depending on power and voltage requirements. Larger designs will include branch protection breakers.

COMPUTER MODULE SWITCHES
1. Power phase rotation select 2. Expanded mode select
3. Number of relays installed. from zero to twelve
4. Size of each relay, either 16%, 33%, 50%, 67% of the total SCR load.
5. Frequency accuracy.

OPTIONAL INPUTS
1. On-line select - raises governor set frequency by 2 Hertz.
2. Raise frequency - raises frequency (for auto-synch ronizers) .
3. Lower frequency - lowers frequency (For auto-synch ronizers) .
4. Wobble frequency - for synchronizing without an auto-synchronizer.

ACCURACY OF FREQUENCY CONTROL
Long term frequency accuracy is typically 0.005 Hz. Short term frequency deviations during 100% load rejection/acquisition will be 8 hertz, 4 hertz, 2 hertz, or 1 hertz depending on internal switch settings.

SYSTEM TIME-KEEPING
Typically 10 seconds per day (unadjusted). an internal quartz crystal. Time keeping greater accuracy is optional.

FOR MORE INFORMATION
Order an installation/operation manual for $8.00 U.S. or $10.00 Canadian.

OPTIONS
1. Crystal adjustment for time-keeping purposes. About 15 seconds a month accuracy.
2. Alarm relay for warning of improper system operation.
Not suggested for use as a turbine shut-down.
3. Spare parts kit. Includes two SCRs, a trigger module, power relay, control relay, fuses, control transformer and a spare computer module.
4. Extra copies, installation and operational manual.
5. Auto-synchronizer inputs.
6. 50 Hertz version

PRODUCT "G" HYBRID WATER AND LOAD CONTROL THOMSON AND HOWE MICROCOMPUTER COMBINED WATER AND LOAD CONTROL GOVERNOR(INDEX)
Purpose

1. Provides 60 Hertz governing for A.C. hydro-electric turbine-generators having mechanical provision for governing control. 2. Provides the built-in ability to maintain water storage levels for peaking purposes without overflowing and wasting water, by means of remote interruptible loads (see also product "C"). 3. Provides stable operation on sites where traditional mechanical governors would be unstable or have slow or poor response. 4. Provides full interfacing to auto-synchronizers.

REQUIREMENTS FOR USE
1. Mechanical means to vary generation required (water control) .
2. Actuator to operate mechanical equipment required.
3. Three phase, 208 to 600 volts. Higher voltage generators may use a transformer to step down 10-20 % of the power to a maximum 600 volts for the product ''G''.

DESCRIPTION
The T.H.E.S. Hydraulic/Load Governor System is housed in a CEMA 12 dust-tight steel enclosure. The smallest enclosure used in 16 inches wide by 24 inches high by 8 inches deep. The number and size of cabinets may vary with the amount of load control. The front panel has a frequency meter and a load meter as well as lights that indicate the status of the outputs.

The PRODUCT "G" provides a load control capability (90, 180, 360 KW at 600 volts three phase) that is normally used with water control. Logic for water control is built in to allow control of plants as large as five- to ten times the size of the load control. Can be used with remote relay control units for peak load shedding and maximizing utilization of the stream flow. Water control actuators may be simple single or dual speed reversible devices- electric, pneumatic, or hydraulic.

CONTROLS
Eight switches select the various functions. Two select the accuracy of frequency control, Two select the timing of the hydraulic action. Two calibrate the governor to the system inertia. One sets the expected phase rotation of the governor power supply. One enables a water conservation feature. An external input is provided for monitoring and controlling water storage for peaking purposes. Governors modified for utility interconnected plants use this input for on-line notification instead.

OPTIONAL INPUTS
l. On-line select - raises governor set frequency by 2 Hertz.
2. Raise frequency - raise frequency (for auto-synch ronizers) .
3. Lower frequency - lower frequency (for auto-synch ronizers).
4. Wobble frequency - for synchronizing without an auto synchronizer.
5. Water Ievel - tells load management units to reduce load when low.

LOAD CONTROL POWER CAPABILITY
90 KW three phase at 600 volts. 75 KW three phase at 480 volts. Can be expanded to double or four times these ratings for larger plants.

ACCURACY OF FREQUENCY CONTROL
Long term accuracy is typically 0.005 Hz. Short term accuracy during load changes is plus or minus 4 hertz, 2 hertz, I hertz, or 0.5 hertz, depending on switch selection. These figures may be exceeded momentarily for large, sudden load changes requiring large hydraulic motion.

TIME-KEEPING
Typically 10 seconds per day (unadjusted). Maintained by an internal quartz crystal.

FOR MORE INFORMATION
Order an installation/operation manual for $8.00 U.S. or $10.00 Canadian.

OPTIONS
1. Failsafe 12-24 volt D.C. water control interface module.
2. Timekeeping crystal adjustment.
3. 50 Hertz calibration.
4. Doubled load control capability for water/load governed plants of 0.6 to 2.0 MW.
5. Quad load control capability for water/load governed plants of 1.5 to 5.0 MW.
6. Adaptation for use with revenue plants interconnecting to an utility.
7. Spare parts kit.
8. Extra manuals.
9. Auto-synchronizing inter-connections.
10. Water level monitoring.


PRODUCT "I" - HYDRAULIC SYNCHRONIZING GOVERNOR THOMSON AND HOWE MICRO-COMPUTER WATER CONTROL GOVERNOR (INDEX)


PURPOSE
1. Provides low cost 50 or 60 Hertz governing by means of simplified hydraulic arrangement. 2. The governor is designed for periodic operation in order to correctly synchronize generators to utility busses.
3. Provides a simple governing action during utility disturbances .
4. Has provision for interfacing to auto-synchronizers.

REQUIREMENTS FOR USE
1. Synchronous utility interconnected plants.
2. Generators of up to 2000 KW.
3. Generators that are not intended to operate in stand alone mode, that is, electrically isolated from the utility for extended periods. 4. Any voltage, single or three phase, Panel requires 120 volts A.C. for operation.

DESCRIPTION
The T.H.E.S. Synchronizing Governor is housed in a CEMA 12 dust-tight steel wall mount enclosure or a 19 inch rack mount enclosure. It is designed to govern by simple electrical control of three hydraulic valves: slow open; slow close; and fast close. Speed monitoring is performed by either a shaft mounted tachometer, or a generator P.T. signal. The set frequency may be shifted by means of auto synchronizer raise/lower signals or automatically wobbled if an active auto synchronizer is not available. When on line, the governor automatically shifts the set frequency up by 2 hertz. The front panel has a frequency meter and lights that indicate the status of the outputs.

FOR MORE INFORMATION
Order an installation/operation manual for $8.00 U.S. or $10.00 Canadian.

OPTIONS
1. D.C. control outputs to hydraulic valving.
2. Governor hydraulic valving unit.
3. 50 Hertz calibration.
4. Spare parts kit
5. Extra manuals
6. Auto-synchronizing inter-connections
7. Rack mount enclosure.

1997 GOVERNING ACCESSORIES


PRODUCT "C" - HYDRO LOAD MANAGEMENT THOMSON AND HOWE MICRO-COMPUTER LOAD MANAGEMENT UNIT FOR HYDRO-ELECTRIC SYSTEMS (INDEX)

PURPOSES
1. Increase the amount of load connectable to an existing system by allowing automatic peak shedding of additional loads remote to the actual governor.
2. Prevent over-speed during load rejection by automatically applying additional loads.
3. Manage energy efficiently by automatically disconnecting or connecting loads in eight levels of priority.
4. Disconnect loads during reduced power availability.
5. Maintain water storage at optimum level for supply of peaking loads (when used with product "G" governors equipped with a water level monitoring probe only). '

REQUIREMENTS FOR USE
1. Systems of any size. The maximum load connectable to each of the eight control outputs will be determined by the governor characteristics.
2. Any voltage, single or three phase. Relays must be bought for the correct power system voltage. The panel requires a 120 volt 60 Hertz source.
3. Run-of-the-stream or water storage capable sites.

DESCRIPTION
T.H.E.S. Load Management Control Computers are housed in CEMA 12 dust-tight steel enclosures. The enclosures is 10 inches wide by 12 inches high by 6 inches deep. The unit is also available as a sub-panel mounted component. Relay control outputs are available internally. Front panel lights indicate the status of the module and the nine outputs .
OPTIONS
1. sub-panel mounting.
2. 50 Hertz calibration.
3. 24 level priority expansion.

PRODUCT "CM" - DIESEL LOAD MANAGEMENT THOMSON AND HOWE MICRO-COMPUTER LOAD MANAGEMENT FOR DIESEL ELECTRIC SYSTEMS(INDEX)

PURPOSE
1. Allows a smaller capacity power generation plant, hence reducing initial capital, maintenance, and end-of-life replacement costs.
2. Improves load factor on diesels, reducing maintenance and improving fuel efficiency.
3. Back-up generation equipment may be scaled down in size considerably, since some or all managed loads may be temporarily removed from the system.
4. Load management can be an alternative to installing more generation capacity on an expanding system.
5. Provides built in logic for starting/stopping additional generation.

REQUIREMENTS FOR USE
1. Remote diesel system of any size. The maximum load connectable to each of the eight control outputs will be determined by the governor characteristics.
2. If the system is connected to a major utility grid, all managed loads will come on and stay on.
3. Any voltage, single or three phase. Relays must be bought for the correct power system voltage. The panel requires a 120 volt 60 Hertz source.

DESCRIPTION
T.H.E.S. Diesel Load Management Control Computers are housed in non-ventilated steel or aluminum enclosures. The enclosures are 10 inches wide by 12 inches high by 6 inches deep. The unit is also available as a sub-panel mounted component. Relay control outputs are available internally. Front panel lights indicated the status of the module and the nine outputs. An output to start auxiliary generation is provided if managed loads stay off too long.

OPTIONS
1. Sub-panel mounting.
2. 50 Hertz calibration.
3. Domestic unit complete with two 20 amp relays for use in homes.
4. 24 level priority expansion.

PRODUCT "C2" - DOMESTIC LOAD MANAGEMENT THOMSON AND HOWE MICRO-COMPUTER LOAD MANAGEMENT UNIT FOR DOMESTIC INSTALLATIONS(INDEX)

PURPOSE
1. Increase the amount of load connectable to an existing systems by allowing automatic peak shedding of up to two loads.in each installed house.
2. Prevent over-speed during load rejection by automatically applying additional loads.
3. Manage energy efficiently by automatically disconnecting or connecting loads in two levels of priority.
4. Disconnect the two loads during reduced power availability.
5. Maintain water storage at optimum level for supply of peaking loads (when used with product "G'' governors equipped with a water level monitoring probe only).
6. Provide a simpler to wire package consisting of a load managing computer and two 20 amp solid state relays.

REQUIREMENTS FOR USE
1. Systems of any size. The maximum load connectable to each of the two relays is 20 amps at either 120 or 240 volts .
2. Run-of-the-steam and water storage hydro-electric sites and also diesel grids.

DESCRIPTION
T. H. E. S . Domestic Load Management Control Computers are housed in totally enclosed aluminum boxes. The enclosures are 12 inches wide by 12 inches high by 4 inches deep. The unit contains the computer module from either a "C" or a "CM" unit, power transformer, and two 20 amp solid state relays that may be used at either 120 or 240 volts. This unit will normally be installed in a house to interrupt two loads selected from the following list: Hot water tanks; Driers; Washing Machines; Space heating. Two lights indicate the status of the two relays.

OPTIONS
1 50 Hertz calibration.

PRODUCT "M" IMMERSION HEATER PRODUCTS (INDEX)

These immersion heaters are specifically designed for use as load dumps by T.H.E.S. Load control governors. Item pictured is a "M2" twelve element tank.

FEATURES
1. Welded stainless steel tank construction.
2. Aluminum enclosure over element connections and terminal strip.
3. Elements are prewired to an easy to wire terminal strip.
4. Floor mount vertical units.
5. Units gang to common manifolds for larger capacities.
6. Rated operating pressure 15 P.S.I.

SIX ELEMENT TANK
1. Good for capacities to 36 KW. Voltage to 480 volts.
2. Dimensions of 22" tall by 7-l/2'' diameter plus terminal boxes .
3. Over temperature trip contact.

TWELVE ELEMENT TANK
1. Good for capacities to 72 KW. Voltage to 600 volts.
2. Dimensions of 22" tall by 11" diameter plus terminal boxes.
3. Over temperature and low water trip contacts.

Multiple TANK MANIFOLDS
1. Factory fitted to tanks.
2. Prices available by request

PRODUCTS "D" - RELAYS THOMSON AND HOWE RELAYS FOR ADDITIONAL LOAD CONTROL (INDEX)

Solid State 15 amp single pole relay in totally enclosed aluminum enclosure, 120/208/240 volt operation.
Solid State 30 amp single pole relay in totally enclosed aluminum enclosure, 120/208/240 volt operation. Includes in internal terminal strip for quick connections.
Solid State dual 30 amp single pole relays in totally enclosed aluminum en closure. Includes internal terminal strip. For one or two load management steps, 120/208/240 volt operation. This relay is often used in conjunction with a product "A" for three phase systems.
Solid State quad 20 amp single pole relays in totally enclosed aluminum en closure. Includes internal terminal strip. For up to four load managements steps, 120/208/240 volt operation. This relay is often used in conjunction with a product "A" for three phase systems.
High voltage electromechanical 40 amp three pole relay with enclosure, 277 - 600 volt operation. Specify voltage when ordering.

PRODUCT "E" - FREQUENCY GUARD THOMSON AND HOWE POWERHOUSE FREQUENCY RELAY FOR SIGNALING EMERGENCY SHUTDOWN(INDEX)

PURPOSE
l. Provides electrical contacts for over/under frequency sensing on stand-alone power systems.

REQUIREMENTS FOR USE
l. stand - alone systems
2. from 1 KW to 500 KW in size.

DESCRIPTION
The T.H.E.S. Frequency Guard is housed in a CEMA 12 dust-tight steel enclosure. The enclosure is 6 inches wide by 8 inches high by 4 inches deep. The front panel has a frequency meter and also a light that indicates the status of the relay.

FREQUENCY LIMIT ADJUSTMENT RANGE
High and low trip limits separately adjustable from 0.5 hertz deviation to 20 Hertz deviation.

DELAY BEFORE TRIPPING TAKES PLACE
The delay before tripping depends on how far the frequency deviates beyond the acceptable limits. If the frequency deviates to double the acceptable deviation, the delay is 1.25 seconds. For instance, if the owner has set 5 hertz limits. then a deviation to either 50 or 70 hertz will trip in 1.25 seconds. If the excess deviation is only half this. say, to 52.5 or 67.5 Hz, then the tripping will take twice as long, about 2.5 seconds.

FEATURES
1. CEMA 12 dust-tight wall mount cabinet.
2. 120 volt operation. (240 volt optional)
3. Analog frequency meter 0-100 Hertz.
4. Terminal strip.
5. Adjustable over and under frequency trip points.
6. Normal power indicator light.

OPTIONS
1. 50 Hz calibration
2. 240 volt operation


PRODUCT "F" - PORTABLE POWER MONITOR THOMSON AND HOWE POWER PLANT TROUBLE ALARM CAN BE PLUGGED IN ANYWHERE(INDEX)

PURPOSE
1. Provides simple to use frequency monitoring for remote A.C. hydro-electric power systems.
2. Provides audible alarming of loss of power or of frequency deviations from 60 Hertz.
3. Invaluable for small systems that tend to ice up at night. This alarm will awake the owner before the plant shuts down completely.

APPLICABLE SYSTEMS
1. Stand-alone A.C. power systems.
2. Any system voltage, single or three phase. Unit requires a 120 volt convenience outlet to plug-into.

DESCRIPTION
The T.H.E..S. Portable Power Monitor is housed in a small metal desk-top cabinet. The front panel has three lights to indicate normal, under and over frequency. The back of the unit has a 5 pin DIN socket that accepts an included plug-in transformer. An internal audible alarm (which can be set very loud, or quiet), will attract attention. This alarm has a battery back-up so it will continue to alarm even during a complete outage.

ADJUSTMENT OF FREQUENCY ALARMING
A single internal adjustment sets upper and lower limits together. Adjustable from near zero to plus or minus 20 Hertz.

FEATURES
1. Desk top metal cabinet.
2. Loud or soft selection of audible alarm.
3. Separate low-voltage plug-in adapter.
4. Internal battery for operating alarm during complete loss of power.

CONTROLS SECTION

PRODUCT "H" - INDUCTION INTERTIE THOMSON AND HOWE MICRO-COMPUTER FOR CONTROL AND PROTECTION OF INDUCTION GENERATORS(INDEX)

PURPOSE
Provides complete control and both machine and utility protection for induction type A.C. hydro-electric power generators to be utility grid interconnected, sized at up to about 200 KW. Usable with large generators according to utility requirements or with additional utility grade relays.

APPLICABLE SYSTEMS
1. Systems with IKW to 200KW generation.
2. Any voltage.
3. Potential and current transformers are supplied with complete switchgear packages only.
4. A generator shaft-end mounted tachometer must be mounted by the installer (tachometer provided with the panel).

DESCRIPTION
The T.H.E.S. induction control/protection panel can be either housed in a CEMA 12 dust-tight steel enclosure or be sub-panel mounted for installation In other switchgear. The CEMA 12 enclosure,- without switchgear, is 12 inches wide by 14 inches high by 6 inch$s deep. The front panel has two pushbuttons (stop, start) and a switch (reclose enable). A tachometer is optional. Four lights are provided that provide complete control status and protection tripping read-outs. The panel comes complete with a built-in diagnostic program. This program substitutes a diagnostic routine for the normal plant control and can be field activated.

CONTROL FUNCTIONS:
1. Automatic reclosing
2. Automatic start-up
3. Smooth shut-down without overspeed

PROTECTIVE FUNCTIONS
1. Undervoltage (all phases)
2. Overvoltage (all phases)
3. Underfrequency
4. Over frequency
5. Negative sequence (current imbalance)
6. Over speed
7. Reverse/minimum generation
8. Long term over current
9. Incomplete sequence
10. Computer failure
11. Tachometer failure

FIELD ADJUSTMENTS
The Product "H" uses multiple switch selections to pick the following choices. The use of switches eliminates the guesswork or calibration instrumentation necessary with trim-pot adjustments.
1. Undervoltage tripping threshold (choice of 8).
2. Undervoltage tripping curve (choice of 4).
3. Overvoltage tripping threshold (choice of 8).
4. Overvoltage tripping curve (choice of 4).
5. Underfrequency tripping threshold (choice of 4).
6. Underfrequency tripping curve (choice of 4).
7. Over frequency tripping threshold (choice of 4).
8. Over frequency tripping curve (choice of 4).
9. Negative Sequence tripping threshold (choice of 4).
10. Reverse/Minimum generation tripping threshold (choice of 4).
11. Overcurrent tripping threshold (choice of 8).
12. Overcurrent tripping curve (choice of 4).
13. Delay before reclosing (choice of 4).
14. Testing modes for commissioning and certification (choice of 16).
15. Generator R.P.M. selection (choice of 8).

OPTIONS:
I . Total switchgear package for 50 KW 3 phase at 480 volts.
2. Total switchgear package for 100 KW 3 phase at 480 volts .
3. Switchgear packages for other voltages, capacities, ask for quote.

FOR MORE INFORMATION
Order an installation/operation manual for $8.00 U.S. or
$10.00 Canadian.


PRODUCT "I" - SYNCHRONOUS INTERTIE THOMSON AND HOWE MICRO-COMPUTER FOR CONTROL AND PROTECTION OF SYNCHRONOUS GENERATORS INTERCONNECTED TO A UTILITY (INDEX)

PURPOSE
Provides control and also machine and utility protection for synchronous type A.C. hydro-electric power generators to be utility grid interconnected. May be combined with additional utility grade relays according to the utility's wishes, or as required by the size of the generator.

APPLICABLE SYSTEMS
1. Turbines with or without governors.
2. Turbines with separate speed governors may also be run in stand-alone mode.
3. Any voltage, any power.

DESCRIPTION
The T.H.E.S. synchronous control/protection panel can be either housed in a CEMA 12 dust-tight steel enclosure or be rack mounted for installation in other switchgear. The enclosure is 12 inches wide by 14 inches high by 6 inches deep. The front panel has two pushbuttons (stop, start) and a switch (reclose enable). Lights are provided that provide complete control status and protective tripping read-outs. The panel comes complete with a built-in diagnostic program. This program substitutes a diagnostic routine for the normal plant control and can be field activated.

CONTROL FUNCTIONS:
1. Automatic reclosing
2. Automatic start-up
3. Smooth shut-down without overspeed
4. Built-in synchronizing governing: (see governing section).

PROTECTIVE FUNCTIONS
1. Undervoltage (all phases)
2. Overvoltage (all phases)
3. Underfrequency
4. Over frequency
5. Negative sequence (current imbalance)
6. Over speed
7. Reverse/minimum generation
8. Long term over current
9. Incomplete sequence
10. Computer failure
11. Voltage restrained over current

FIELD ADJUSTMENTS
The Product "I" uses multiple switch selections to pick the following choices. The use of switches eliminates the guess work or calibration instrumentation necessary with trim-pot adjustments.
1. Undervoltage tripping threshold (choice of 8).
2. Undervoltage tripping curve (choice of 4).
3. Overvoltage tripping threshold (choice of 8).
4. Overvoltage tripping curve (choice of 4).
5. Underfrequency tripping threshold (choice of 4).
6. Underfrequency tripping curve (choice of 4).
7. Over frequency tripping threshold (choice of 4).
8. Overfrequency tripping curve (choice of 4).
9. Negative Sequence tripping threshold (choice of 4).
10. Reverse/Minimum generation tripping threshold (choice of 4).
11. Ovcrcurrent tripping threshold (choice of 8).
12. Ovcrcurrent tripping curve (choice of 4).
13. Delay before reclosing (choice of 4).
14. Testing modes for commissioning and certification (choice of 16).

FOR MORE INFORMATION
Order an installation/operation manual for $8.00 U.S. or $10.00 Canadian.

PRODUCT "L" - HEAD LEVEL CONTROLLER THOMSON AND HOWE MICRO-COMPUTER HEAD LEVEL CONTROLLER (INDEX)


PURPOSE
1. Provides accurate, simple to calibrate head level or power control for hydro-electric plants with up to three turbines.
2. Provides convenient connection to simplified hydraulic valving as would be used with a product "1", "H" or "G" .
3. Eliminates vulnerable position feedback sensors on water control devices.
4. Prevents excessive wear by requesting a minimal number of flow corrections.
APPLICABLE SYSTEMS
1. Stand-alone plants with water storage or load management.
2. Any size reservoir
3. One to three turbines

DESCRIPTION
The product "L" is a micro-computer based device housed in either a CEMA 12 dust-tight steel enclosure, or a 19" rack mount enclosure. Inputs are required for the level signal, and a power transducer signal is required from each generator to be controlled.
Open/close/start/stop signals are provided for as many as three turbine/generators. A mode select switch, level/ power adjustment, and meters indicating plant power output and head level are provided. The product "L" will provide power to the head sensor for the probe's internal electronics over the same pair of wires used for the signal transmission .

ACCURACY OF LEVEL CONTROL
Typical steady state level accuracy of the controller will be better than 1/2 inch. An optional conductivity probe option is available for constantly recalibrating the head probe and controller to a guaranteed no drift accuracy of 1/8 inch. If requested, the controller will optionally maintain preset plant output to an accuracy of 1%.

FOR MORE INFORMATION
Order a manual for $5.00 U.S. or S6.00 Canadian.

PRODUCT "LT" - HEAD LEVEL PROBE THOMSON AND HOWE SUBMERSIBLE COMBINED WATER DEPTH TRANSDUCER/TRANSMITTER(INDEX)

PURPOSE
1. Eliminates level signal problems due to icing by measuring water level by means of pressure at a position below the ice level.
2. Eliminates field calibrations by being supplied with factory preset calibrations.
3. Less expensive than industrial transducer/transmitters.

APPLICABLE SYSTEMS
1. 1-5 feet of water (2-10 feet optional)
2. Used in conjunction with a 2 wire controller such as a product "L'' that provides a 15 -20 volt power supply.
3. Controller or metering must be suitable for a 2 wire 4-20 MA transmitter output.

FEATURES
1. ABS plastic/epoxy construction, totally sealed.
2. Directly submerged, unaffected by air temperature or ice.
3. Factory calibrated 4 MA per foot sensitivity (2 MA optional).
4. Factory calibrated set-point of 0 feet.
5. True 2 wire transmitter design. Only one pair of small signal wires will both transmit the signal and also provide the power to operate the probe electronics.

FOR MORE INFORMATION
Order a manual for $3.00 U.S. or $4.00 Canadian.
PRODUCT "N" - D.C. PRIORITY MANAGER FOR USE ON SMALL BATTERY POWERED SYSTEMS (INDEX)

PURPOSE
1. Increase battery life by reducing cycling and depth of discharge .
2. Increase system efficiency by using up excess energy once the battery is charged.

APPLICABLE SYSTEMS
1. D.C. Battery systems, whether micro-hydro, solar, or other. 2. D.C. Ioads or inverter operated.

DESCRIPTION
The T.H.E.S. D.C. priority manager is a small box that monitors the voltage across the system battery. If the battery voltage drops below the adjustable minimum, loads are turned off in sequence to avoid deep discharge. The lower the voltage, the faster loads are turned off. When the Battery voltage returns to normal, loads are turned back and in order of priority as long as the voltage does not drop. High and low limits are separately adjustable.

OPTIONS:
1. D.C. Control relays. (inverter operated systems may use "D" series of A.C. relays).
2. 120 volt 60 cell battery option.