~ 3 ~
PEF-
321АВР
NOVATEK-ELECTRO
This Operation Manual is intended to let you know about the device, safety requirements, operation and
maintenance procedures for the Control unit for automatic transfer switch PEF-321
АВР ((hereinafter in the text
321ABP; device).
1 DESIGNATION
The device is designed to operate as a part of control cabinets for automatically turning on backup power in
uninterruptible power supply systems.
321ABP controls automatic transfer from the main three-phase power source to the backup one and vice versa
in case of unacceptable voltage deviations in phases, asymmetry or phase imbalance, changing the phase
sequence, breaking one or more phases in the "main" or "standby" networks.
The device can be used in power supply networks as a part of devices:
- automatic switching on a standby source (ABP);
- automatic start of a three-phase electric generator.
Device 321АВР controls voltage at two inputs of three-phase four-wire networks 230 / 400V with a grounded or
insulated neutral wire.
2 TECHNICAL SPECIFICATIONS
The general data of 321ABP are shown in Table 1. The main technical characteristics of 321ABP are shown in
Table 2. Output contact specifications are shown in Table 3.
Table 1 -
General
Description
Value
Designation of the device
Control and distribution equipment
Rated operating mode
Long lasting
Product protection
IP20
Electrical shock protection class
II
Climatic version
NF 3.1
Permissible pollution
II
Overvoltage category
III
Rated insulation voltage, V
450
Rated impulse withstand voltage, kV
4.0
Wire cross section for connecting to terminals, mm
2
0.5
– 2
Tightening torque of terminal screws, N * m
0.4
Table 2
– Main technical specifications
Description
Value
Rated AC three-phase supply voltage, V
380
– 400
Type of lines controlled
Two three-phase
four-wire inputs
Mains frequency, Hz
48
– 62
Voltage hysteresis, V
5
Number of three-phase controlled inputs
2
Voltage at which operability is maintained:
-
phase voltage with supply from one phase and connected neutral wire, V, not less
-
linear voltage with supply from three phases, V, not more
100
450
Cutoff thresholds for
Input 1
,
Input 2
, acc. to Umax, V
Table 5
Cutoff thresholds for
Input 1
,
Input 2
, acc. to Umin, V
Contactor sticking control
yes
Switching wear resistance, thousand times
30
Inputs:
- analog inputs for measuring three-phase voltage at the inputs, pcs.
- analog inputs for measuring three-phase voltage at the load, pcs.
- analog input for connecting 12 V DC, pcs.
6
3
1
Outputs:
- discrete output for connecting the control winding of a three-phase load contactor, pcs.
- discrete output of voltage state at the inputs, pcs.
- discrete output of voltage presence at least at one phase of any input, pcs.
- discrete output for connecting indication of generator work, pcs.
- discrete output of generator control, pcs.
- digital input/output for connecting via RS-485 protocol, pcs.
- digital input/output for connecting via USB, pcs.
2
2
1
1
1
1
1
Time delay for voltage distortion, s
Table 5
Time delay of response to phase sequence failure, s
Table 5
Time delay of response to phase failure alarm, s
Table 5
