Nortel Meridian 1 Option 11C Planning And Installation Manual page 208

Page 208 of 408 Installing and connecting reserve power supplies
553-3021-210 Standard 7.00
11 Set the breaker in the battery unit to ON to test for correct wiring.
The NTAK76 green LED (BATT) should switch on.
DC voltage can be measured between the test points whenever the
green BATT LED is lit on the NTAK76. The test points are protected by
high resistance: it is impossible to damage the battery unit by
short-circuiting the test points to each other or to the metal case. For
valid readings the test points must not be short circuited. The following
different voltage readings can be made:
• open circuit battery voltage when the NTAK0420 cable is
disconnected and the NTAK76 circuit breaker is closed
• NTAK04 or NTDK78 DC output when the NTAK0420 cable is
connected and the NTAK76 circuit breaker is open
• NTAK04 or NTDK78 float charge voltage when the NTAK0420
cable is connected and the NTAK76 circuit breaker is closed
12 Set the breaker on the NTAK76 battery unit and the breaker on the
NTAK04 or NTDK78 power supply to OFF.
13 Plug the NTAK0420 cable from the battery box into the power
supply in the cabinet. See Figure 86 on page 209.
Secure the cable with the cable retainer inside the cabinet.
14 Set the breaker on the Option 11C power supply to ON.
The NTAK04 or NTDK78 "BATT" LED should be off and the NTAK76
LED should be on.
15 Set the breaker on the NTAK76 battery unit to ON.
The NTAK04 or NTDK78 "BATT" LED should be lit and the NTAK76
LED should be on.
16 Replace the cover on the system cabinet and secure the latch.
January 2002