Installation Instructions

Section 5876 Installation Instructions
Issue AT, April 26, 2013 Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B)
Page 4-10 Chapter 4. Making Electrical Connections
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c) With the Test loop closure still applied, apply the Emergency Stop loop
closure. Verify MCA displays EMERGENCY STOP INPUT IS ON.
Release the Emergency Stop loop closure.
d) With the Test loop closure still applied, apply the High Voltage Shutdown
loop closure. Verify MCA displays HI VOLTAGE SHUTDOWN INPUT IS
ON. Release the High Voltage Shutdown loop closure.
e) Release the Test loop closure.
5) Rectifier Emergency Shutdown and Fire Alarm Disconnect (ESTOP):
Customer-furnished loop closure applied between terminals 9 and 10 of TB1
inhibits all Rectifiers in all bays comprising the power system. Manual restart is
required.
Connections to MCA Customer Alarm Relay Circuit Cards
MCA Customer Alarm Relay circuit cards can be installed in any of the seven card cage
positions in each Power/Distribution or Power Only Bay. Each circuit card contains six
(6) relays and associated Form-C relay contacts. Each relay on each card can be
programmed via the MCA to energize or deenergize when an "MCA Relay Function
Channel" alarms. "MCA Relay Function Channels" are programmed via the MCA to
alarm for a multitude of conditions. Refer to the Installing the Rectifiers and Initially
Starting the Power System chapter for programming information.
Refer to Figure 4-5 and Table 4-1A if you are using the default MCA Relay Function
Channel configurations and the default MCA Customer Alarm Relay assignments.
Refer to blank Table 4-1B if you want to document a custom configuration.
Connections are made to terminal block TB1 located on the circuit card. Refer to Figure
4-4 for location and connector TB1 pinouts. Terminal block TB1 consists of two separate
terminal blocks that snap into a common housing. The two terminal blocks can be
removed from the common housing by first loosening the two screws on each; then
gently pulling the terminal block from the common housing. This feature facilitates circuit
card wiring and circuit card replacement, if required.
Wires are connected to the terminals by inserting the stripped wire into the wire opening,
and then tightening the screw. The wires should be checked for proper installation by
gently attempting to pull the wires from the terminal. The terminal block accepts a wire
size in the range of 28 to 16 AWG. Recommended torque is 2.0 in-lbs. Note that one of
the terminal blocks needs to be removed to gain access to the wire clamping screws of
the other.
Connections to MCA I/O Circuit Cards
MCA I/O circuit cards can be installed in any of the seven card cage positions in each
bay. These circuit cards offer a variety of analog inputs and outputs, and binary inputs.
Refer to the Installing the Rectifiers and Initially Starting the Power System chapter for
programming information.
Note: Use of the MCA’s ‘Alternate Current Limit’ feature requires an MCA I/O circuit
card be installed.
Connections are made to terminal block TB1 located on the circuit card. Refer to Figure
4-4
for location and connector TB1 pinouts. Terminal block TB1 consists of two separate
terminal blocks that snap into a common housing. The two terminal blocks can be
removed from the common housing by first loosening the two screws on each; then