Utility Relay Company AC-PRO-II, Инструкция по эксплуатации

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AC-PRO-II
®
Instruction Manual www.utilityrelay.com
Page 3
The AC-PRO-II
®
is a state of the art, micro-controller based
trip unit for use on three phase, 600 Volt class, AC circuit
breakers on 50 Hertz or 60 Hertz systems. The AC-PRO-II
features a rotatable 128 x 64 Multi-line, Organic Light Emitting
Diode (OLED) Display, smart buttons, and LEDs.
The standard AC-PRO-II provides:
•
Overload and fault protection
•
RS485 communications
•
QUICK-TRIP
®
arc flash hazard reduction ready
•
Patented Sluggish Breaker
®
detection
•
Time stamped trip history with waveform capture
•
InfoPro-AC
TM
software interface
•
Ready for the SAFE-T-TRIP
®
hand-held remote trip
device
•
And many other features
Additionally, with the optional Voltage Divider Module (VDM
TM
),
the AC-PRO-II can provide over/under voltage protection and
power calculations.
The AC-PRO-II is 55% smaller than the original AC-PRO
®
and
including more features and more flexibility. The smaller form
factor allows application on a wider range of breakers. The trip
unit features versatile user settings that allow setting the
frequency (50Hz or 60Hz), CT secondary rating, and Ground
Fault type in the field, eliminating the need for a special factory-
configured trip unit and simplifying the kit ordering process.
The AC-PRO-II is backwards compatible with existing AC-PRO
CTs, actuators, wiring harness, and settings, making direct
replacements easy. Similar to AC-PRO, the AC-PRO-II
settings are entered using simple parameters. No percentages
or multipliers are required. AC-PRO-II settings are
programmed using the easy-to-read multi-line OLED display.
The AC-PRO-II includes the following Current-based features:

Long Time (LT)

Short Time (ST)

Instantaneous (I)

Ground Fault (GF)

Thermal Memory (for LT, ST, & GF)

Neutral Overload (NOL)

QUICK-TRIP Instantaneous (QT-I)

QUICK-TRIP Ground Fault (QT-GF)

Current Metering

Overload (Long Time pickup) Alarm

Instantaneous Override (I-OVRD)
(factory setting – normally disabled)

Instantaneous on Close (I-CLOS)
(factory setting – normally enabled)
The AC-PRO-II measures the true RMS current through
each of the breaker’s three poles.
AC-PRO-II settings include a Ground Fault type setting,
which allows the user to select either Residual Ground Fault
protection (vector sum), or Ground Return Ground Fault
protection (measures GF directly).
The QUICK-TRIP Instantaneous and QUICK-TRIP Ground
Fault protective settings are available to minimize downstream
Arc Flash Hazard.
The AC-PRO-II uses a unique algorithm to determine if the
RMS currents are greater than 12 times the CT rating where
the CTs may be saturated. The AC-PRO-II then corrects the
effect of CT saturation on the Long Time and Short Time trip
functions.
The AC-PRO-II can be provided with an optional Voltage
Divider Module (VDM) attached to the back of the trip unit.
When configured with the VDM, the AC-PRO-II offers the
following Voltage-based features:
•
Rated for up to 600V three-phase systems
•
Under-Voltage (Brown Out) trip & alarm
•
Over-Voltage trip & alarm
•
Voltage metering
•
Power metering:
(KW, KVA, KWHr, KVAHr, Power Factor)
•
VDM provides continuous trip unit power even when the
breaker is open and not carrying current, allowing for
communications, even without CT power.
In addition, the AC-PRO-II also features the following:
(features are standard for all AC-PRO-II trip units unless noted
otherwise)
•
Configurable alarm relay (form C)
•
Self-Test
•
Front USB port for settings upload and download,
SAFE-T-TRIP remote trip device, auxiliary power and
firmware updates
•
OLED multi-line display
•
RS-485 Modbus RTU communications
•
Versatile user settings provide more flexibility than the
original AC-PRO:
o
50Hz or 60 Hz operation
o
Phase CT secondary ratings:
1A, 0.5A, 0.4A, 0.25A, 0.2A
o
Neutral CT secondary ratings:
2A, 1.5A, 1A, 0.5A, 0.4A, 0.25A, 0.2A, 0.18A
o
Ground Fault type can be set to “Residual” or
“Ground Return” depending on the CT location &
Ground Fault scheme.
•
Compact form-factor allows the AC-PRO-II to be used on
a wide range of breakers, including more insulated case
breakers.
•
Backwards compatibility with AC-PRO actuators, CT’s,
wiring harness, and settings.
•
Waveform capture
•
Sluggish Breaker
•
Time-stamping of Trip events
The trip unit stores the trip history data for the last 8 trip
events and the trip log data in a non-volatile FRAM memory
for later recall. All the settings are stored in non-volatile
memory. Battery backup is not required.
The trip unit does not require external power to operate. Power
is derived from the current transformers (CTs). An internal
battery provides power to review and change protection
settings when CT power is not available.
The AC-PRO-II trip unit is manufactured under multiple
patents. See the link below for additional information:
http://www.utilityrelay.com/patents.html
1.0 Introduction and Product Overview
1.1 Current Protection and Functions
1.2 Voltage and Power Features - optional
Voltage Divider Module (VDM)
1.3 Additional Features