Utility Relay Company AC-PRO-II, Instruction Manual

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AC-PRO-II
®
Instruction Manual www.utilityrelay.com
Page 4
AC-PRO-II® is currently UL and ULC classified for use on
the following low voltage AC power circuit breakers:
Square D/Westinghouse DS-206, DS-416, DS-632
General Electric AKR-75
ITE K-600, K-800, K-3000
Siemens/Allis-Chalmers LA-1600
UL and ULC classification is in accordance with UL1066,
CSA C22.2, IEEE C37.59-2007 as well as appropriate
sections of ANSI C37.17-1979 and C37.50-1989.
The AC-PRO-II has the CE Mark.
AC-PRO-II was tested by an independent laboratory and
found in compliance with the following standards:
IEEE C37.90.1-2002, Surge Withstand
IEEE C37.90.2-2004, RF Susceptibility
EN 61000-4-3: 2006, RF Immunity
EN 61000-4-4: 2004, Fast Transient
EN 61000-4-5: 2006, Surge Immunity
EN 61000-4-2: 2009, Electrostatic Discharge Immunity
EN 55011: 2007, Radiated Emissions
The
AC-PRO-II can be powered in 5 different ways: CTs,
internal battery, USB port, 24VDC auxiliary, or by the
Voltage Divider Module (VDM).
The AC-PRO-II is normally powered from the breaker phase
CT’s if at least one phase current is above the CT power-up
threshold. See Table 3-A for CT power-up values. If the
current is not high enough to power the trip unit, the trip unit
will power down. If the unit is powered down and a fault
occurs requiring rapid response, the high current of the fault
provides CT power and the trip unit performs as published in
the Time Current Curves.
If the trip unit is connected to a Voltage Divider Module
(VDM), USB, or 24VDC auxiliary power, these sources
provide constant power.
During normal operation (in service), if the trip unit is
powered by current or voltage and no errors are present, the
OK LED should be ON. If current is too low or if voltage (via
VDM) is not present, pressing the “DISPLAY” Push button
will temporarily power up the trip unit and display using the
internal battery. The OK LED should then be on.
The AC-PRO-II derives both the signal and power from the
breaker phase CTs. For 1-Amp CT’s, the trip unit will power-
up with less than 6% of the rated CT tap current through a
single CT. See complete table below:
Phase CT Secondary
Rating
Current required to power
AC-PRO-II
(in % of CT Primary Rating)
1.0 Amp 6%
0.5 Amp 12%
0.4 Amp 15%
0.25 Amp 24%
0.2 Amp 30%
0.18 Amp 33%
Table 3-A: CT Power-up values
A 3-Volt, 850 mAh, CR2, long life Lithium battery is used in
the trip unit. There are no restrictions on transport and no
special methods of disposal required with this battery.
The AC-PRO-II design uses the battery for the following
functions / features:
1) Allows the user to commission (program) the trip unit
without using the auxiliary power pack.
2) Allows the user to recall the last trip data even if the
breaker is open and without using the auxiliary power
pack.
3) Maintains the internal clock for accurate time and date
for time stamping the trip history and on-demand
waveforms.
4) Allows resetting (unlatching) the alarm relay when no
other power source is available.
Press the “DISPLAY” push button to turn the trip unit on
under battery power.
When on battery power, the trip unit will automatically turn
off 60 seconds after the last button is pushed to conserve
battery energy.
**** NOTE ****
The battery is NOT involved in the protective functions of
the trip unit. The trip unit will provide protection even if the
battery is removed.
The battery is NOT required for the trip unit to maintain
any of its memory including the user programmed pick-up
and delay settings and the last trip data.
If the battery voltage is low, the internal date/time clock
will not be correct.
See Section 21.0 for battery data and instructions on
replacing the battery.
The AC-PRO-II
®
is equipped with a mini-USB port on the
face of the trip unit and it can be used to power the trip unit
with the USB 5Vdc supplied by a computer, USB wall-pack,
etc.
The AC-PRO-II
®
includes a 24VDC auxiliary power input, for
connection to the B-292 Secondary Injection Test Set, and
other auxiliary power sources.
URC 24VDC Accessories:
24VDC wall-pack: URC Part # T-490-ASM
24VDC harness: URC Part #CA-AC2-24VDC
24VDC Auxiliary power requirements:
Voltage: 23-28VDC with correct polarity
Power supply sizing: 3 watts minimum per AC-PRO-II
Protection: protect each AC-PRO-II with 1A fuses
Use a minimum of 1 power supply per lineup.
Do not ground the minus of the 24VDC system
The AC-PRO-II
®
trip unit is available with an optional Voltage
Divider Module (VDM). The VDM provides breaker 3-Phase
voltage used for power information and also provides power
for the trip unit independently from the CTs. See Section 8.0
for more information on the Voltage Divider Module (VDM).
2.0 UL/ULC Classification & CE Mark
3.0 Trip Unit Power
3.1 Current Transformer (CT) Power
3.2 Battery Power
3.3 USB Power
3.4 24VDC Auxiliary Power
3.5 Voltage Divider Module (VDM) Power
(option)