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SAFETY FOR LIFE
PRE-INSTALLATION CHECK
Pre-Installation
! | WARNING: This equipment is not intended to | |
protect human life. Follow all locally approved pro- | ||
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cedures and safety practices when installing or operating this equipment. Failure to comply can result in death, several personal injury and equipment damage.
G102.1
! | WARNING: Hazardous voltage. Never rely on | |
the open position of the operating handle or the | ||
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contact position indicator; it does not ensure that the line is deenergized. Follow all locally approved safety practices. Failure to comply can result in contact with high voltage, which will cause death or severe person-
al injury. | G123.1 |
The Type S automatic
Note: This procedure does not test complete control opera- tion. This can be done only on a complete installation basis with the S control operating the
Test Set–up
1.Connect a 120 Vac, 60 Hz power supply to terminals Z and G2 of TB2 being absolutely certain that the grounded side of the power supply is connected to G2.
2.Jumper terminal Z to Y to X to C to B to A.
3.When the 120 Vac power supply is turned on, all six phases are energized.
4.To simulate loss of voltage on any phase of either source, simply unscrew the appropriate fuse “FU” in the control.
Test Procedure
1.Check the indicating lamps by depressing the LAMP TEST switch (S6). All lamps on the front panel of the control (including fault block accessory if installed) should light with equal brilliance.
2.With phase Y and/or phase B energized, terminals 11 and 21 of TB1 will always show 120 Vac to ground (G1 or G2).
3.With OPERATIONS SELECTOR switch (S3) set to MANUAL, terminal 13 of TB1 will respond to the operation of MANUAL OPER. SOURCE I switch (S1) showing 120 Vac to ground when S1 is in the open position and 10 Vac, or less, when S1 is in the OFF and CLOSE positions. Terminal 23 of TB1 will show similar voltages to ground in response to the opera- tion of MANUAL OPER.
4.When MANUAL OPER. SOURCE I switch (S1) is in
the CLOSE position there should be 120 Vac
between terminal 15 of TB1 and ground. Similarly, when MANUAL OPER. SOURCE II switch (S2) is in the CLOSE position there should be 120 Vac between terminal 25 of TB1 and ground.
5.To check the response of the latching relay to auto- matic operation, proceed as follows:
A.Set OPERATION SELECTOR switch (S3) to AUTO.
B.Select the desired source preference and return mode with switch S4.
C.After waiting for a time in excess of the maximum transfer delay timer setting (to make sure the con- trol is at rest), simulate a “lost” phase by unscrew- ing one of the preferred source fuses. Listen for relay clatter to recognize breaking the circuit.
D.As soon as phase voltage is lost, the PREFERRED TO ALTERNATE TIMER will start to run. Verify the LED timer is illuminated during operation.
E.When timing is complete, the latching relay (R1) will operate. Its position can be checked by the presence of 120 Vac at test terminals
F.Replace the removed fuse to restore preferred source power, observe operation of the ALTER- NATE TO PREFERRED TIMER, and check the status of the latching relay (R1) when timing is completed.
Note: SOURCE PREFERENCE switch S4 cannot be in NO PREF position for this test.
G.Other modes of transfer can be checked by pro- gramming the control for the desired sequence, simulating loss of source voltage, observing resul- tant control operation, and checking the final posi- tion of the latching relay (R1).
6.Timer settings can be verified with a watch while per- forming the checks in preceding Step 5.
7.Switch I and Switch II position indicating lamps will not operate during this preinstallation check since the
Their operation can be verified by connecting a 100 ohm, 1 watt, resistor from TB1 terminals to ground as follows:
SWITCH I OPEN
5