GE Industrial Solutions CPS6000 - Manual (Page 151)

CPS6000 –48V Indoor/Outdoor Power Shelf
Issue 21 January 2008
151
Module Features
The ES772A module has the following features:
• 16 Alarm inputs. These inputs may be used to monitor for distribution circuit breakers
with micro-switch closures for protector opening, GMT style fuses with or DIN style
circuit breakers. Furthermore, the two Auxiliary Major alarms may be used to monitor
micro-switch closures from other devices such as a fan or a door, etc.
The alarming states for the different inputs are as stated below:
° 10 inputs to alarm or an open to VBus(-) for DIN style circuit breakers (J5 pins 1-
10)
° 2 inputs to alarm on closure to VBus(-) for Auxiliary Major alarming from external
source (J5 pins 11 and 12)
° 2 inputs to alarm upon closure to VBus(-), for distribution protector open alarms (J1
pins 6 and 13)
° 2 inputs to alarm upon closure to VBus(-) for battery circuit breaker open alarms (J1
pins 7 and 14)
• (2) LVBD or LVLD Contactor Manual Disconnect Switches are provided. These
switches allows users to manually open up to two external contactors to disconnect a
battery string from the V(-) bus and allow the user to perform maintenance on the
battery. The switches can also disconnect a load from the V(-) bus if the contactor is
configured for load disconnect.
• Reverse Battery Protection. If wired as instructed in Fig. 2 or 3 (see below), the
ES772A will prevent the closure of contactors with batteries that are wired in reverse
polarity. It will be active during initial start-up and also during servicing if the integral
battery disconnect switches are used to connect and disconnect the battery strings from
the V(-) bus. If the battery strings are wired in reverse polarity and an attempt was
made to close the contactor, the ES772A will disconnect all contactors and appropriate
alarms will be transmitted.
If an external disconnect switch is used to take battery strings off-line for servicing, care
must be taken to ensure battery connections are correct at the disconnect switch. This is
because the contactors remain closed when an external disconnect switch is used to
disconnect the batteries from the bus. If the batteries are reconnected in reverse polarity,
closing the switch will result in the batteries being connected to the bus in reverse
polarity.
If the external disconnect switch is connected as shown in Fig 3, then the reverse battery
protection feature will be provided.
Read all warning statements prior to making any connections.
• Manual LVD Cont Connect - Manual LVD Contactor Connect. This feature allows the
CPS6000 system to resume powering the load after low voltage disconnect of batteries