Protective Relays
WC1 & WCT1 Series, Overcurrent
Product Facts
n
n
n
n
Function 50/51
ANSI/IEEE C37.90-1978
UL File No. E58048
R
TERMINAL STRIPS
#6 - 32 SCREWS
Product Specifications
Line Current
— Single Phase,
AC current, 50-400 Hz Direct or from CT
Control Voltage
— See Ordering
Information
Trip Point
— Screwdriver adjustable.
Adjustment range in accordance with
ordering information.
Pick-Up to Drop-Out Differential
—
Approximately 0.1 amp.
Overcurrent Allowance
—
Maximum of 500% for 0.25 seconds
Surge Withstand Capability
—
In compliance with C37.90B ANSI/IEEE
Operating Temperature
—
-40°C to +70°C
Temperature Drift
— ± .05%
Burden
—
Current input — 1.2 VA,
Control voltage — 2.5 VA
Contact Ratings
—
One set, N.O., One set N.C.
5 amp resistive at 120 VAC or 28 VDC
Notes:
1. Remove black screws for access
to the current pick-up and the time
delay adjustment.
2. Clockwise rotation of the pick-up
adjustment will raise the current
trip point.
3. Clockwise rotation of the time
delay adjustment, (Type WCT1
only) will increase the time delay.
CSA File No. LR61158
R
3.0
Current sensitive relays
are available for single and
three phase applications.
Voltage controlled overcur-
rent relays protect genera-
tors against fault currents
below the full rated value,
when the fault produces a
voltage drop as in the case
of short circuits or grounds.
Phase balance relays are
available to sense and
control unbalanced
current flow in three phase
systems. Current differen-
tial relays operate when the
differential between two
currents exceeds preset
values. Over/under current
phase-band relays are also
available.
23
3 1
/4
/2
11 /64" DIA.
4 MTG. HOLES
Note:
Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
Time Delay
Standard Time Delay
(WC1 Series)
— A fixed inverse time
delay is incorporated in all overcurrent
relays and is represented by the typical
curves shown.
Adjustable Time Delay
(WCT1 Series)
— The time delay is
field adjustable. The standard time delay
can be increased by any value between
0.5 and 20 seconds.
Ordering Information
Sample Part Number
WCT1 -48DC -5 -B
8
Control Voltage (± 15%)
26 DC
48 DC
125 AC
120 AC
230 AC
380 AC
460 AC
Trip Adjustment Range
1 = .2 amp - 1 amp
5 = 1 amp to 5 amp
10 = 2 amp to 10 amp
Other Options
A = Two normally open contacts
B = Two normally closed contacts
11–24
Catalog 5-1773450-5
Revised 3-13
www.te.com
Dimensions are shown for
reference purposes only.
Specifications subject
to change.
Current (amps)
Type:
WC1 = Per Time Curves
WCT1 = Adjustable Time Delay
6
4
2
0
0
0.1
31
3 7
/2
/8
See next page for
WCT Can Dimensions
Typical Curves (WC1 Series)
Pick-Up Time Delay
0.2
0.3
0.4
See next page for 3-phase types
and consult factory for additional
models.
Dimensions are in millimeters
unless otherwise specified.
USA: +1 800 522 6752
Asia Pacific: +86 0 400 820 6015
UK: +44 800 267 666
For additional support numbers
please visit www.te.com
京公网安备 11010802033920号
EEWORLD
