WTH-100/B+C/R/1P-550WTH-100/B+C/R/1P-690WTH-100/B+C/R/1P-885  

Paperless Datasheet
Going green and protecting environment is manufacturers' responsibility. Each WatchfulEyE product has a link of downloading data sheet on its enclosure:
http://datasheet.watchfuleyesolutions.com/US120278.html

Model & Ordering Code

Model Ordering Code Remote Contacts UPC/EAN Code
WTH-100/B+C/R/1P-550 US120278 YES -
WTH-100/B+C/1P-550 US120268 NO -
Model with suffix WTH-100/B+C/R/1P-550 x2pcs x3pcs x4pcs
Ordering Code US120278 US120278x2 US120278x3 US120278x4
Model with suffix WTH-100/B+C/1P-550 x2pcs x3pcs x4pcs
Ordering Code US120268 US120268x2 US120268x3 US120268x4



Certificates of Products

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Description
In accordance with: IEC/EN61643-11 - Class I+II and UL1449 Type 4 Location
Location of use: main sub-distribution boards, branch sub-distribution boards
Plug-in module and separate base design enables convenient maintenance.
Internal thermal disconnect devices help ensure safe or at end-of-life
WTH-100/B+C/R/1P-550 Series Technical Data
Requirement Class to IEC/EN61643-11 Class I+II
IEEE Category Rating C, B & A
Maximum Continuous Operating Voltage (Uc/MCOV) 550VAC 50/60Hz
Nominal Discharge Current (In) 50kA
Max. Discharge Current (Imax) 100kA
Pulsed Current (Iimp) 12.5kA
Voltage Protection Level (Up) 2.8kV
Residual Voltage (Ures) 1.8kV
Protection Modes L-PE, N-PE
Protective Element High Energy 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 >125A) 125A gL (circuit-breaker: <63A)
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 36mm (2TE)
Housing Material Thermoplastic (UL94 V-0)
Housing Design Modular design
Net Weight Per Unit 0.5Lb (227g)

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Surge Protection Connection Diagram


Indication of two levels of surge protection
The capability of displaying 50 percent of surge protection capacity: under normal circumstances, with two MOVs' protection at the same time, the module can realize Class I surge protection; in case that one of the indicator windows indicates red, there's still 50% of surge protection capacity to meet Class II surge protection requirements, and the module shall be replaced timely at this point.

Dimensions


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Remote Contacts (Dry Contacts)
1: COM (Common)
2: NC (Normally Close)
3: NO (Normally Open)


Contact Ratings 125VAC/3A, 250VAC/1.5A
Terminal Cross Section Max. 1.5mm²
Stripping Length Contacts 0.25 inches (6-7mm)
Remote Terminal Torque 0.25Nm


Fault Indication

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Common Terms and Definitions
1. Normal operating voltage rating (Un)
2. Maximum Continuous Operating Voltage (Uc/MCOV):
Maximum r.m.s. voltage, which may be continuously applied to the surge protective device's mode of protection.
3. Nominal Discharge Current for Class II Test (In):
crest value of the current through the surge protective device having a current waveshape of 8/20μs.
4. Maximum Discharge Current (Imax):
Crest value of a current through the surge protective device having an 8/20μs waveshape and magnitude according to the manufacturers specification. Imax is equal to or greater than In.
5. Voltage Protection Level (Up):
Maximum voltage to be expected at the surge protective device terminals due to an impulse stress with defined voltage steepness and an impulse stress with a discharge current with given amplitude and waveshape.
6. Residual Voltage (Ures):
Crest value of voltage that appears between the terminals of an surge protective device due to the passage of discharge current.
7. IEEE 62.41
CATEGORY C: outdoor overhead lines, service entrance (most severe)
CATEGORY B: major feeder, short branch circuits, service panel (indoor)
CATEGORY A: long branch circuits, receptacles (indoor) (least severe)

How to choose a suitable Uc(MCOV) value
Note: Uc >1.15Un
The relationship between two parameters Uc and Up of a surge protective device is proportional.
If Uc is small, the value of Up is also small; surge protective devices with smaller Up can provide better surge protection.
Whether to choose smaller Uc depends on the voltage stability of the grid.
If you choose surge protective devices with smaller Uc for the grid with instable voltage, the surge protective devices will frequently work while the grid voltage fluctuates, resulting in shortening surge protective device's product life.
If you choose larger Uc, and the value of Up is accordingly large, the surge protective efficiency will not be so fine.
If you are unsure of the voltage stability of the grid,
it is suggested to calculate MCOV(Uc) using the following formula: √ 2  Un < Uc < √ 3 Un

AC Network (Un) MCOV(Uc), L/N-PE Protection Mode
110V, 120/208V, 127/220V 150V
220/380V 275V, 320V, 385V
230/400V 275V, 320V, 385V, 420V
240/415V 320V, 385V, 420V
266/460V, 277/480V 385V, 420V
347/600V 550V, 690V
Wind Power System 690V (Grid side ), 885V (Gen side )

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AC Network Connection Diagram (1/2)





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AC Network Connection Diagram (2/2)


Difference mode & Common mode Connection Diagram


Common mode:L-PE, N-PE surge protection
Difference mode:L-N surge protection

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Selection of back-up fuse

Selection of back-up circuit-breaker

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Application


Key
1. Origin of the installation
2. Distribution board
3. Distribution outlet
4. Main earthing terminal or bar
5. Surge protective device, class I or II tested
6. Earthing connection (earthing conductor) of the surge protective device
7. Fixed equipment to be protected
8. Surge protective device, class II tested
9. Surge protective device, class II or class III tested
10. Decoupling element or line length
F1, F2, F3 overcurrent protective disconnectors
NOTE Refer to IEC 61643-12 for further information.

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FAQ & Help
1. What should I do if I can't find the paper manual in the product packaging?
Watchful Eye products is committed to going green with paperless data sheets. On the side of each product enclosure is an engraved link with URL for downloading paperless data sheet and QR code of the website. If you need the paper data sheet, you can open the link and print the data sheet by yourself.

2. The advantages of fault indication windows?
If surge protection fails, the fault indication windows will turn red, thus it can be seen intuitively, and the surge protective device can be replaced in time to avoid damage to the equipment caused by a second surge.

3. What instruments can be used to test whether its surge protection function is normal or not?
Test with a Watchful Eye surge protector tester

4. Can you list more applications?
Power supply panel, whole house

5. What is the feature of Class I+II?
It provides high capability of Class I surge protection, and capability of Class II (equivalent to the parameters of WTH-40 ) fine protection with low residual voltage as well, applying to Class I and Class II surge protection in multiple areas. If you are not sure which module to choose for protecting your area, Class I + II is the best solution.

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