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Governors America Corp. © 2021 Copyright All Rights Reserved

LSM200 Series Load Sharing Modules  6-2021-B1   PIB4100 

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INITIAL ADjUSTMENTS (CONTINUED)

LSM200 Series monitors forward and reverse power output of the generator. The reverse power relay signals if the generator’s power 

has gone negative. If negative power exists above a small level, the generator must be removed from service.  Reverse power relay 

contacts are Terminals 25-27.

The set point is adjustable between 2 % and 20 % based on a 5 A CT rating at 100 % power, where 0 is the most sensitive and 100 is 

about 20 % reverse power, the highest setting.

NOtE

: The reverse power monitor circuit must have a jumper wire or a reverse power reset switch across Termi-

nals 18 and 19. The Reverse Power reset jumper or switch must be in p/ace at Terminals 18 & 19 for this monitor 

to function.

Latching and non-latching operation of the Reverse Power monitor relay signal is supported. Factory defaults 

are set to non-latching configuration which, when a reverse power condition above the set point takes place, the 

reverse power relay activates. When the reverse power condition reduces or disappears, the monitor automatically resets.

If a latching condition for the reverse power monitor is required, connect E1 and E2 together. These posts are located on the circuit 

board just above and to the right of the AC Voltage Selector DIP Switch. On the LSM201N module, these posts are located on the 

circuit board just above the AC Voltage Selector DIP Switch. 

 

REvERSE POWER MONitOR

The forward power monitor can signal two levels of power output from the generator. The two trip points are:

• 

ON where power is increasing and exceeds the monitors high limit set point. ON range is from 20-100% power which corresponds 

to a 0-80 on the adjustment scale.

• 

OFF when the power is falling below the monitors lower load limit set point.  OFF range is from 0-80% 

power which corresponds to 0-100 on the adjustment scale. 

• 

If the maximum CT currents are less than 5 A, the adjustment range will exceed these power levels.

The monitor also includes a DELAY adjustment. In the full CCW position (0) the delay is very short, about 0.4 

seconds. In the full CW position (100), the delay is about 30 s.

An internal relay with 10 A Form C contacts normally open (NO) and normally closed (NC) are included at Ter-

minals 28, 29, and 30 along with an LED to signal the monitor relay status.

1. 

Always set the ON point first with the delay set to minimum delay. With the ON adjustment at a setting of 80, adjust the generator 

load for a desired trip point, i.e. 90% load. Turn the ON adjustment CCW until the monitor turns on with 90% load applied.

2.  With the OFF adjustment at a setting of 0, adjust the generator load for a desired reset point, i.e. 20% load. Adjust the OFF 

adjustment CW until the monitor resets to OFF with the load reduced to 20%.

3. 

Adjust the monitor’s DELAY setting. The Full CCW position offers minimum delay (about 0.4 seconds) and the Full CW position 

offers a delay of about 30 seconds. These are inverse time delays as in the reverse power circuits.

PROGRAMMABilitY

Once the ON and OFF adjustment have been set, they can be externally programmed with an analog DC signal at Terminal 22.  If 

this terminal is connected to signal ground, it will lower the set point of the monitors approximately 20%. Raising the voltage at Termi

-

nal 22 above the nominal 3 V will increase the set points to a level higher than the internal settings. Consult GAC for details.

 FORWARD POWER MONitOR

 vOltAGE SiGNAl: 

ANALOG POwER OuTPuT SIGNAL, INTERNAL ANd ExTERNAL METERING

The voltage signal at Terminals 32 (+) and 33(-) may be adjusted with the EXTERNAL POWER METER 

CAL adjustment, and has a range of approximately -1 to 5 V DC. These voltages are proportional to the CT 

currents. An output of 5V indicates 5 A CT current (forward power) and -1 volt will indicate 1 A CT current 

(reverse power). Terminal 32 maximum current consumption should be limited to 10 mA.

The Internal Power Meter / Bar graph displays the generator power in the external power meter operation. 

The bar graph can be calibrated for generator power. The display normally shows the zero power output 

position with no power, or with full power to the applied to the generator it displays the third dot.  Adjust the 

GENERATOR

 POWER DISPLAY CAL for a full-scale reading. Be sure that the adjustment is made by moving CW from 

the zero position.

use care when setting the Reverse Power delay so excessive delay does not damage the generator or 

switch gear.

do Not disconnect the CT’s while the engine is running.

Содержание LSM200 Series

Страница 1: ...nest electric governors have minor frequency differences among units to be paralleled which would cause power variations In this case one generator set would continuously increase the power it produces while the other sets would decrease the power they produce This condition eventually leads to motorizing one or more generator engines The load sharing system continuously adjusts the governor speed...

Страница 2: ...nerator sets that are to be synchronized must be tested independently for their maximum capabilities Information should be gath ered for reference if operational issues arise after installation of this product Read this entire installation manual before starting installation of this product An overspeed shutdown device independent of the governor system should be used to prevent loss of engine con...

Страница 3: ...erator Electrical connections are illustrated in the wiring diagrams Choice of a proper wire size is dependent on the maximum current expected at specific terminals of the load sharing module Large gauge wire should be used for Current Transformer CT Terminals 4 to 9 as the current can reach a maximum of 5 A Long wires with high resistance can add to the burden of the CT shielded wire is recommend...

Страница 4: ...4 Governors America Corp 2021 Copyright All Rights Reserved LSM200 Series Load Sharing Modules 6 2021 B1 PIB4100 LSM201N STANDARD FILTERING 4 WIRING ...

Страница 5: ...s common mode signals Battery minus for all generators must be connected together to limit high common mode signals indicating an unbalanced load condition Each load sharing unit takes action to control its governor to minimize this imbalance The imbalance should be less than 2 when the system is adjusted properly The parallel cable voltage is proportional to the load on the generator The voltage ...

Страница 6: ...osition 100 the delay is about 30 s An internal relay with 10 A Form C contacts normally open NO and normally closed NC are included at Ter minals 28 29 and 30 along with an LED to signal the monitor relay status 1 Always set the ON point first with the delay set to minimum delay With the ON adjustment at a setting of 80 adjust the generator load for a desired trip point i e 90 load Turn the ON ad...

Страница 7: ... are possible if the capability of the engine is not limiting the system Optimize this adjustment with repetitive load steps ILC Individual Load Control and Load Ramping Load Anticipation Function Solder a jumper wire across these posts without damaging the circuit board When a reverse power condition occurs the internal relay will activate and latch To reset the relay open the external Reverse Po...

Страница 8: ...ay Full CCW Fastest Load Sensitivity 100 Most Sensitive Load Anticipation 0 0 External Power Meter Cal 100 Max Range ILC Load Ramp 20 Approx 4 Sec Generator Power Ramp 0 0 Generator Power Adjust 0 0 Generator Power Display Cal 50 5 Amps Full Scale Terminal Voltage Measurement Value 31 to 23 Internal Power Supply 10 6 0 2 V DC 12 to 23 Output to Governor 5 0 0 1 V DC Terminal Voltage Measurement Va...

Страница 9: ...ent from 100 slowly toward 0 until the monitor turns on Remove the generator load The monitor should turn OFF reset Recheck the setting by applying the 10 load again The Reverse Power Delay may now be set by turning this adjustment CW The minimum delay necessary should be used otherwise leave this setting to full CCW minimum delay Note The delays are of the inverse time type See previous descripti...

Страница 10: ... above readings look for an open generator neutral connection missing AC current or AC voltage signal or SW1 voltage range switch set improperly 10 To confirm that the Load Sharing portion is controlling the governor temporarily connect a jumper across Terminals 10 to 11 and short Terminals 13 to 14 11 Apply load to the engine The speed of the engine should fall droop as more load is applied to th...

Страница 11: ...ded to use shielded cable for all external connections Be sure that only one end of the shields including the speed sensor shield is connected to a single point on the case of the speed control unit Mount the speed control to a grounded metal back plate or place it in a sealed metal box Radiation is when the interfering signal is radiated directly through space to the governing system To isolate t...

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