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PRODUCT DATASHEET
OVRHT3B
Sub Distribution and Panelboard – 400A and below
Product features
• UL Listed 1449 4th edition for Type 1 SPD applications.
• 50kA per phase protection.
• Individual thermally fused and protected MOVs.
• Includes pre-wired pigtail conductors.
• Multiple MOVs per phase eliminates single point failure.
Available configurations
Model number kA per
OVRHT3B501201P 50kA 120V 1-phase, 2-wire + ground
OVRHT3B502201P 50kA 220V 1-phase, 2-wire + ground
OVRHT3B502301P 50kA 230V 1-phase, 2-wire + ground
OVRHT3B502401P 50kA 240V 1-phase, 2-wire + ground
OVRHT3B502771P 50kA 277V 1-phase, 2-wire + ground
OVRHT3B503471P 50kA 347V 1-phase, 2-wire + ground
OVRHT3B501202S 50kA 120/240V 2-phase, 3-wire + ground
OVRHT3B502402S 50kA 240/480V 2-phase, 3-wire + ground
OVRHT3B502403H 50kA 120/240V 3-phase High-Leg, 4-wire + ground
OVRHT3B501203Y 50kA 120/208V 3-phase Wye, 4-wire + ground
OVRHT3B502203Y 50kA 220/380V 3-phase Wye, 4-wire + ground
OVRHT3B502303Y 50kA 230/400V 3-phase Wye, 4-wire + ground
OVRHT3B502403Y 50kA 240/415V 3-phase Wye, 4-wire + ground
OVRHT3B502773Y 50kA 277/480V 3-phase Wye, 4-wire + ground
OVRHT3B503473Y 50kA 347/600V 3-phase Wye, 4-wire + ground
OVRHT3B502403D 50kA 240V 3-phase Delta, 3-wire + ground
OVRHT3B503803D 50kA 380V 3-phase Delta, 3-wire + ground
OVRHT3B504003D 50kA 400V 3-phase Delta, 3-wire + ground
OVRHT3B504803D 50kA 480V 3-phase Delta, 3-wire + ground
OVRHT3B506003D 50kA 600V 3-phase Delta, 3-wire + ground
Earthing Systems
OVRHT3B502301PI 50kA 230V
OVRHT3B502301PJ 50kA 230V
OVRHT3B502301PK 50kA 230V
OVRHT3B502301PL 50kA 230V
Warranty
3-years
Voltage Configuration
phase
1-phase, 2-wire + ground
(for TNC earthing systems)
1-phase, 2-wire + ground
(for TNS earthing systems)
1-phase, 2-wire + ground
(for IT earthing systems)
1-phase, 2-wire + ground
(for TT earthing systems)
2 OVRHT3B SERIES SURGE PROTECTIVE DEVICES
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Product specifications
Electrical
Nominal discharge current rating (I-n) 20kA (Earthing Systems 10kA)
Operating frequency 47–63Hz
Connection methods Parallel to load
Modes of protection See performance data
Fault rating (SCCR) 100 kAIC
Response time Less than 1 nanosecond
Standard monitoring LED status indicator lights
Mechanical
Weight .23 kg (.5 lb.)
Enclosure type NEMA 4X, non-metallic
Installation location Indoor/Outdoor
Mounting method 12.7mm (1/2")–14 NPT thread
Operating environment -35° to +80°C (-31° to +176°F)
Altitude Up to 5000 m (16,400 ft.)
Product design Individual thermally fused and
Regulatory
UL 1449 4th edition Type 1
UL 96A Yes
IEEE C62.41.1, .2, C62.45 Yes
Listed by UL
914.4mm (36") of 3.31mm
wires
(one per phase)
protected MOVs
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Dimensional specifications
12.7mm (1/2")-14 NPS thread
H
3.31mm2 (#12 AWG) stranded wire
600V PVC insulation
914.4mm (36") long
2
(#12 AWG)
OVRHT3B series Earthing Systems
There is a OVRHT3B model for each power system
configuration (neutral grounding practice) as
defined in EN60950:
For TNC grounded systems use “I” suffix – Neutral
and PE (protected earth conductor) are combined
throughout the system while TNCS splits the
combined PEN into a separate neutral and PE at the
service entry; the U.S. practice is a variation of this.
The neutral is earthed at the transformer for both
types. The OVRHT3B50230I model is suited for both
TNC and TNCS systems.
For TNS grounded systems use “J” suffix – Neutral is
earthed at the transformer; however, is not bonded to
earth or the PE elsewhere. The PE is carried to the site
from the transformer and bonded to site earth. The
OVRHT3B50230J model is intended for use on this
system; it can also be used on TNCS as well as on U.S.
120/240V services without the neutral.
For IT and IT-L grounded systems use “K” suffix – The
transformer is unearthed or earthed through high
impedance. The PE originates at site; however, is not
bonded to a service conductor. No conductor in this
system is designated as neutral. The OVRHT3B50230K
model is suited for this application; it can also be used
on TT, TNS, TNCS and U.S. services without neutral
power systems.
For TT grounded systems use “L” suffix – Neutral is
earthed at the transformer. The PE originates at site;
however, is not bonded to the neutral. There is no
interconnection between the PE and transformer
earth. The OVRHT3B50230L model is for use on this
system; it can also be employed upon TNS, TNCS and
U.S. services without neutral.
W
Dim Millimeters (Inches)
H 75.0 (2.95)
W 90.0 (3.54)
D 75.0 (2.95)
D
Aluminum bracket
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Performance data
3
Model number Protection
modes
OVRHT3B501201P L-N 150 700
L-G 300 1200
N-G 150 700
OVRHT3B502201P L-N 320 1200
L-G 640 2500
N-G 320 1200
OVRHT3B502301P L-N 320 1200
L-G 640 2500
N-G 320 1200
OVRHT3B502401P L-N 320 1200
L-G 640 2500
N-G 320 1200
OVRHT3B502771P L-N 320 1200
L-G 640 2500
N-G 320 1200
OVRHT3B503471P L-N 420 1500
L-G 840 3000
N-G 420 1500
OVRHT3B501202S L-N 150 700
L-G 300 1200
N-G 150 700
L-L 300 1200
OVRHT3B502402S L-N 320 1200
L-G 640 2500
N-G 320 1200
L-L 640 2000
OVRHT3B501203H L-N 150 700
L-G 300 1200
N-G 150 700
L-L 300 1200
H-N 320 1200
H-G 470 1800
H-L 470 1500
OVRHT3B501203Y L-N 150 700
L-G 300 1200
N-G 150 700
L-L 300 1200
OVRHT3B502203Y L-N 320 1200
L-G 640 2500
N-G 320 1200
L-L 640 2000
OVRHT3B502303Y L-N 320 1200
L-G 640 2500
N-G 320 1200
L-L 640 2000
OVRHT3B502403Y L-N 320 1200
L-G 640 2500
N-G 320 1200
L-L 640 2000
OVRHT3B502773Y L-N 320 1200
L-G 640 2500
N-G 320 1200
L-L 640 2000
OVRHT3B503473Y L-N 420 1500
L-G 840 3000
N-G 420 1500
L-L 840 2500
MCOV UL 1449
4th edition
6kV 3000A
VPR
Model number Protection
OVRHT3B502403D L-G 300 1200
OVRHT3B503803D L-G 640 2500
OVRHT3B504003D L-G 640 2500
OVRHT3B504803D L-G 640 2500
OVRHT3B506003D L-G 840 3000
Earthing Systems
Model number
OVRHT3B502301PI L-N 320 1200
OVRHT3B502301PJ L-N 320 1200
OVRHT3B502301PK L-N 320 1200
OVRHT3B502301PL L-N 320 1200
modes
L-L 300 1200
L-L 640 2000
L-L 640 2000
L-L 640 2000
L-L 840 2500
Protection
modes
L-G 320 1200
N-G 320 1200
L-G 420 1500
N-G 420 1500
L-G 552 1800
N-G 320 1200
L-G 552 1800
N-G 552 1800
MCOV UL 1449
4th edition
6kV 3000A
VPR
MCOV UL 1449
4th edition
6kV 3000A
VPR
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