Eaton
RD420WK
Type RD—High Instantaneous
Molded Case Switch
Eaton RD420WK Type RD—High Instantaneous Molded Case Switch Series-C
Frame Size - R
Part Index
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Type R (3-Pole) Shown

RD420WK — Type RD—High Instantaneous (K) Molded Case Switch

Number
of Poles		 Amperes Interrupting
Capacity		 Terminals
4 2000 — Includes B2016RDL
rear connectors.

Notes:
Molded case switch may trip above 17,500 amperes.

Quick Reference Guide

UL 489/CSA Interrupting Capacity Ratings(1)
Circuit
Breaker
Type		 Number
of Poles		 Interrupting Capacity (kA Symmetrical Amperes)
Volts AC (50/60 Hz)
240 277 480 600
RD 3, 4 125 — 65 50
CRD(2) 3 125 — 65 50
RDC 3, 4 200 — 100 65
CRDC(2) 3 200 — 100 65
IEC 947-2 Interrupting Capacity Ratings(1)
Circuit
Breaker
Type		 Number
of Poles		 Interrupting Capacity (kA Symmetrical Amperes)
Volts AC (50/60 Hz)
240 415 690
RD
Icu 3, 4 135 70 25
Ics 3, 4 100 50 13
RDC
Icu 3, 4 200 100 35
Ics 3, 4 100 50 18

NOTES:
(1) Utilization Category A circuit breakers.
(2) 100% rated breakers.

Specifications

Trip Unit Type Digitrip
RMS 510		 Digitrip
RMS 610		 Digitrip
RMS 810		 Digitrip
RMS 910		 Digitrip
OPTIM 1050
rms sensing Yes Yes Yes Yes Yes
Breaker Type
Frame R R R R R
Ampere range 800–2500A 800–2500A 800–2500A 800–2500A 800–2500A
Interrupting rating
at 480 volts 		65, 100 (kA) 65, 100 (kA) 65, 100 (kA) 65, 100 (kA) 65, 100 (kA)
Protection
Ordering options LI, LS, LSI, LIG,
LSG, LSIG		 LI, LS, LSI, LIG,
LSG, LSIG		 LI, LS, LSI, LIG,
LSG, LSIG		 LI, LS, LSI, LIG,
LSG, LSIG		 LSI(A), LISG
Fixed rated plug (In) Yes Yes Yes Yes Yes
Overtemperature trip     Yes Yes Yes Yes Yes
Long Delay Protection (L)
Adjustable
rating plug (In)		 No No No No No
Long delay
pickup 		0.5–1.0 x (In) 0.5–1.0 x (In) 0.5–1.0 x (In) 0.5 –1.0 x (In) 0.4–1.0 x (In)
Long delay
time I2t 		2–24 seconds 2–24 seconds 2–24 seconds 2–24 seconds 2–24 seconds
Long delay
time I4t		 No No No No 1–5 Seconds
Long delay
thermal memory    		Yes  Yes Yes Yes Yes
High load
alarm		 No 0.85 x Ir 0.85 x Ir 0.85 x Ir 0.5-1.0 x Ir
Short Delay Protection (S)
Short delay
pickup 		200–600%
S1 and S2 x (Ir)		 200–600%
S1 and S2 x (Ir)
 200–600%
S1 and S2 x (Ir)
 200–600%
S1 and S2 x (Ir)
 150-800% x (Ir)(1)(2)
Short delay
time I2t 		100–500 ms 100–500 ms 100–500 ms 100–500 ms 100–500 ms
Short delay
time flat 		100–500 ms 100–500 ms  100–500 ms 100–500 ms 100–500 ms
Short delay
time zone
selective
interlocking 		Yes Yes Yes  Yes Yes
Instantaneous Protection (I)
Instantaneous pickup 200–600%
M1and M2 x (In)
 200–600%
M1and M2 x (In)
 200–600%
M1and M2 x (In)
 200–600%
M1and M2 x (In)
 200–800% x (In)(2)
Discriminator Yes(3) Yes(3) Yes(3) Yes(3) Yes
Instantaneous override Yes Yes Yes Yes Yes
Ground Fault Protection (G)
Ground fault
alarm(4)		 No No No No 25–100% x (In)
Ground fault
pickup(4)		 25–100% x (Is) 25-100% x (Is) 25–100% x (Is) 25–100% x (Is) 25–100% x (In)
Ground fault
delay I2t 		100–500 ms 100–500 ms 100–500 ms 100–500 ms 100–500 ms
Ground fault
delay flat 		100–500 ms 100–500 ms 100–500 ms 100–500 ms 100–500 ms
Ground fault
zone selective interlocking   		Yes Yes Yes  Yes Yes
Ground fault
thermal memory		 Yes Yes Yes Yes Yes
System Diagnostics
Status LEDs Yes Yes Yes Yes Yes
Cause of
trip LEDs		 Yes Yes Yes Yes Yes
Magnitude of
trip information		 No Yes Yes  Yes Yes
Remote signal contacts No Yes Yes Yes Yes
System Monitoring
Digital display No Yes Yes Yes Yes(5)
Current No Yes Yes Yes Yes
Voltage No No No Yes No
Power
and energy		 No No Yes Yes Yes
Power quality—harmonics No No No Yes Yes
Power factor  
No No Yes
(over Eaton PowerNet
only)		 Yes Yes
Communications
Eaton
PowerNet		 No No Yes Yes Yes
Testing
Testing method Integral Integral  Integral  Integral OPTIMizer, BIM,
PowerNet

NOTES:
BIM = Breaker Interface Module
(A) = GF Alarm
Is = Sensor Rating
In = Rating Plug
Ir = Long Delay Pickup Setting x In

Notes:
(1) Except 2500 ampere frame is 200–600%.
(2) Varies by frame.
(3) LS/LSG only.
(4) Not to exceed 1200 amperes.
(5) By OPTIMizer/BIM.

RD420WK Dimensions

Eaton RD420WK Dimensions
Number of Poles Width Height Depth
3 15.50 (393.7) 16.00 (406.4) 9.75 (247.7)
4 20.00 (508.0) 16.00 (406.4) 9.75 (247.7)



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