Recommended Features On Customer Supplied Power Equipment; Current And Voltage Meters; Visual And Audible Alarms - Nortel Meridian 1 Manual

Page 476 of 500 Appendix D: Customer supplied power equipment
Typically a disconnect voltage is 42 Volts DC, to provide adequate protection
of batteries. When the AC input voltage returns and the batteries are
sufficiently recharged, the Meridian 1 power can be restored by switching the
Meridian 1 circuit breakers.
The alarm signal is pin 7 on connector J4 on the NT8D22 system monitor.
This signal is normally open circuit and is grounded when the Trip signal is
activated.
The NT8D46AW cable may be used for providing both Alarm and Trip
signals.
For more information, see Appendix A.
Recommended features on customer supplied power
equipment

Current and Voltage Meters

Customer supplied power equipment should be fitted with meters, either
analog or digital, to allow monitoring of both output voltage and output
current.

Visual and Audible Alarms

Customer supplied power equipment should be fitted with visual alarms for
the following fault conditions:
— Distribution Fuse or Distribution Circuit breaker trip
— AC Power Fail
— Individual Rectifier fail
Audible alarms may also be provided.
553-3001-210 Standard 14.00 June 1999