WatchfulEyeSolutions

Paperless Datasheet

Going green and protecting environment is manufacturers' responsibility. WatchfulEye products have the links of downloading data sheet on its enclosure:
http://datasheet.watchfuleyesolutions.com/USR120458.html

Description

In accordance with: IEC 61643-1 - Class III and UL1449 Type 4 Location
Location of use: branch sub-distribution boards
Plug-in module and separate base design enables convenient maintenance.
Network with RS485/Modbus, smart remote monitoring

Technical Data

Requirement Class to IEC61643-1	Class III
IEEE Category Rating	B & A
Nominal Discharge Current (In)	10kA
Max. Discharge Current (Imax)	20kA
Open circuit voltage (Uoc)	20kV
Protection Modes	L-PE, N-PE
Protective Element	MOV
Follow Current (If)	NO
Response Time (tA)	<5ns
Leakage Current (at 75%U1mA)	<20μA
Thermal Protection	YES
Protection Rating (IP Code)	IP 20
Short Circuit Current Ratings (SCCR)	25kA rms
Max. Back-up Fuse (if mains >50A)	50A gL (circuit-breaker: <20A)
Surge Life at 3kA (8/20μs)	>5000 events
Temperature Range	- 40°F to 176°F (-40°C to 80°C)
Relative Humidity	0% to 95% noncondensing
Maximum Operating Altitude	10,000 feet (3000m)
Terminal Cross Section	35mm² (solid) / 25mm² (stranded)
Stripping Length Contacts	0.6inches (15mm)
Terminal Screw Torque	Max. 3.5Nm
DIN Rail EN60715	35mm top-hat rail
Dimensions DIN 43880	90mm (5TE)
Housing Material	Thermoplastic (UL94 V-0)
Housing Design	Modular design
Net Weight Per Unit	1.23Lb (560g)
Package Dimension (W×H×D)	3.6"×3.6"×2.7" (90mm×90mm×69mm)
Smart Remote Monitoring	YES
Surge Count	0-999
Network Connection	RS485/Modbus
SPD Module Monitoring	Built-in Integration

Smart Detector Connection Guide

1. Connect the induction coil of surge counter to the 2-port pluggable terminal block (no direction). Hitch the induction loop to the earthing line.
2. Connect USB line (5VDC) to micro usb port of surge counter, and then LED is on.

Connection Diagram

Dimensions

Fault Indication

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Ordering Information

Model	Uc(AC/DC)	Up	Ures	Ordering code
WTH-20/D/R/4P-150 RS485	150/200V	1.1kV	0.8kV	USR120153
WTH-20/D/R/4P-275 RS485	275/350V	1.3kV	1.0kV	USR120154
WTH-20/D/R/4P-320 RS485	320/400V	1.4kV	1.1kV	USR120155
WTH-20/D/R/4P-385 RS485	385/500V	1.5kV	1.2kV	USR120156
WTH-20/D/R/4P-420 RS485	420/600V	1.7kV	1.4kV	USR120157
WTH-20/D/R/4P-885 RS485	885/1000V	2.7kV	2.2kV	USR120458

※ Frequency: 50/60Hz (AC Power)
※ How to Name Models on UL Listing: http://datasheet.watchfuleyesolutions.com/UL.html

Common Terms and Definitions

Maximum Continuous Operating Voltage (Uc or MCOV):
Maximum r.m.s. voltage, which may be continuously applied to the SPD's mode of protection.

Nominal Discharge Current for Class II Test (In):
crest value of the current through the SPD having a current waveshape of 8/20.

Maximum Discharge Current (Imax):
Crest value of a current through the SPD having an 8/20 waveshape and magnitude according to the manufacturers specification. Imax is equal to or greater than In.

Open Circuit Voltage (Uoc):
Open circuit voltage of the combination wave generator at the point of connection of the device under test.

Voltage Protection Level (Up):
Maximum voltage to be expected at the SPD terminals due to an impulse stress with defined voltage steepness and an impulse stress with a discharge current with given amplitude and waveshape.

Residual Voltage (Ures):
Crest value of voltage that appears between the terminals of an SPD due to the passage of discharge current.

Application

	WTH-20/D/R/4P RS485 Series
www.watchfuleyesolutions.com	Surge Protective Device for AC Power Supply System