Syrelec, Brand of Crouzet Control WRA SERIES Data Sheet

CONTROLS CONTROLS

Products and specifications subject to change without notice.

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SPECIFICATIONS:

Input Power Directly . . . . . . . . 3 x 220 60 Hz

from controlled voltage ±15% 3 x 380 60 Hz

3 x 440 60 Hz

Power consumption . . . . . . . . . 3 VA at 220 V

Output . . . . . . . . . . . . . . . . . . . SPDT relay

Contact material . . . . . . . . . . . AgCdO

Maximum Loading . . . . . . . . . 10 AC resistive 8A DC inductive

Maximum switching voltage . . 250 VAC 250 VDC

Relay max. power rating . . . . . 220 VA 80 W

Mechanical life of relay . . . . . . 30 x 106operations

Electrical life of relay . . . . . . . . 2 x 105operations at 2200VA resistive load

Operating temperature . . . . . . +14°F to +140°F -10°C to +60°C

Weight . . . . . . . . . . . . . . . . . . . 7 oz. (200g)

Note: The alarm threshold adjustment is 5% to 15% of asymmetry between

the phases. The initial response time is .1 seconds at 5% asymmetry and 1
second at 15% after input power is applied. When a phase loss or failure
occurs, the “off delay” response time is 100 ms.

MOUNTING

D = DIN-rail mounting
L = 11 pin plug-in
P = 8 pin plug-in

SERIES

WRA

L

MOUNTING

WRA

SERIES

380 A

INPUT POWER

INPUT POWER

220A = 3 x 220 VAC
380A = 3 x 380 VAC
440A = 3 x 415/440 VAC

WIRING DIAGRAM:

ORDERING INFORMATION:

MODE OF OPERATION:

The WRL Phase Control Relay monitors the sequence loss or reversal
of three phase power supplies. The output relay is energized when
the phase sequence is correct and is de-energize when the phase
sequence is wrong or one phase is lost. It monitors the symmetry
of 3 voltages and a loss of phase even when the voltage is reinjected
through a machine. The rate of asymmetry is controlled between 5%
and 15% by a top mounted potentiometer.

DWRA

LWRA

PWRA

11

1

1

12

4

2

14

3

8

R

5

3

S

6

4

T

7

5

WRA SERIES

PHASE CONTROL RELAY

UL listed CSA recognized (220 VAC Version Only)

• Monitors
Phase Sequence
Loss of Any Phase even if Induced Voltage
reaches 95% of Nominal Voltage

• LED Relay Status Indicator

• SPDT 10 Amp Relay Output

R S T R S T R S

R

R T S

T

R = L1
S = L2
T = L3

11

12 14

STOP

START

NR

ST

D1

M

RST

d1 U V W