Littelfuse ER-5WP Series - Manual

V O L T A G E O N T H I S S U R F A C E R I S E S
T O L I N E - T O - N E U T R A L V O L T A G E
W H E N A G R O U N D F A U L T O C C U R S
N
C A U T I O N
H I G H V O L T A G E
.
.
. . . . . . .
. . . . . . . . . .
E R - 5 W P
S E N S I N G R E S I T O R S
2 0 K :
2 5 0 0 V A C M A X
RATINGS:
MAXIMUM VOLTAGE
MAXIMUM CURRENT
RESISTANCE
THERMAL CONTINUOUS
20 k:
125 mA
2,500 Vac
105.0 (4.1
3)
52.5 (2.07)
7.9
(0.31)
12.0
(0.47)
21.0
(0.83)
381.0
(15.00)
ALTERNATE NEUTRAL CONNECTION
NEUTRAL CONNECTION
0.25-20 UNC
THREADED
INSERT
10-32 THREADED
INSERT
TOP VIEW
316.0
(12.44)
0.25-20 UNC STUD
188.0 (7
.40)
FRONT VIEW
NOTE 2
SIDE VIEW
MINIMUM DISTANCE
TO ADJACENT OBJECTS
NOTE 3
MINIMUM CLEARANCE FROM BASE
254.0 (10.00)
127
.0
(5.0
0)
254.0
(1
0.0
0)
355.6
(14.00)
457.0
(18.00)
50.7
(2.00)
MOUNTING DETAIL
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. TERMINAL-BLOCK SCREWS: 6-32 x 0.25.
3. MOUNTING SCREWS: M6 OR 0.25-20.
4. THIS DEVICE CAN DISSIPATE
300 WATTS. TO MINIMIZE SURFACE
TEMPERATURES FOR SYSTEMS
ALLOWED TO OPERATE
CONTINUOUSLY WITH A GROUND
FAULT, MOUNT VERTICALLY WITH
R & G TERMINALS DOWN.
Revision:
Rating: 2,500 Vac 50/60 Hz
125 mA Max 20 K
Duty Cycle:
ER-­5WP
SENSING RESISTOR
Serial No:
1-­800-­TEC-­FUSE (1-­800-­832-­3873)
Made in Saskatoon, Canada
Use with: Neutral Grounding Resistor Monitor Models SE-­325 and SE-­330
Continuous
R