GAC LSM200 Series Manual Download Page 8

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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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BEFORE STARTING ThE ENGINE

Once the LSM200 Series is connected into the system per the appropriate wiring diagram, the following adjustments can be made in 

the following order. 

1.  Pre-checks

2.  Current transformer phasing

3.  load sharing adjustment 

4.  Load anticipation adjustment

5.  Reverse power adjustment

6.  Forward power Monitor adjustment

7.  Power meter operation

The following pre-checks must be made before starting engine:

1.  With the Reverse Power reset jumper or switch in place at Terminals 18 & 19, set the following:

2.  Measure the following voltages at these terminals in this order with DC power applied to the unit.

3.  Apply AC voltages to unit (run engine at no load)

ADjUStMENt

POSitiON

 

SEttiNG

Reverse Power

10

Approx. 5%

Reverse Power Relay

Full CCW

Fastest

Forward Power “On”

80

100%

Forward Power “OFF”

100

0%

Forward Power Delay

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

 

vAlUE

TPI1 (+) to TP2 (-)

Generator Power Signal

0 ± 0.2 V DC

32 (+) to 33 (-)

Internal Power Meter

0 ± 0.2 V DC

 

PRE-CHECKS

LETHAL HIGH VOLTAGE is present at Terminals 1, 2, & 3. do not disconnect the CT wiring (Terminals 

4, 5, 6, 7, 8, 9) when the generator is operating.

CURRENt tRANSFORMER PHASiNG

Test for Phasing:

1.  With a DC meter across TP1 (+) and TP2 (-), apply a small amount of load to the generator and note the voltage reading and polarity. 

2.  With a large gauge jumper wire, short out each CT signal (Terminals 4 to 5, 6 to 7, 8 to 9) one at a time. 

3.  If the short is of low resistance, a 1/3 drop in voltage at the test points will be measured. 

4.  If the drop is not near 1/3 or the voltage increases, the CT / AC line voltage phasing is improper and must be corrected in the wiring.

Summary of Contents for LSM200 Series

Page 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...

Page 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...

Page 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...

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

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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