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TNR-B Surge protective device
Application scope

TNR-B series of surge protectors are suitable for AC 47-63Hz TT, TN, IT and other power supply systems, and are widely used for all kinds of power supply two level (B) over voltage protection. The low voltage main distribution cabinet is usually installed in the building into the distribution cabinet.

Technical parameter
Model TNR-B10 TNR-B80 TNR-B60 TNR-B40 TNR-30 TNR-B25
Maximum sustained operating voltage Uc(V~) 385/440 385/440 385/440 385/440 385/440 385/440
Nominal discharge current ln(ka) 100 80 60 40 30 25
Maximum discharge current limp(ka) 160 120 100 80 60 50
Protection level Up(kv) <2.5/30 <2.5-3.0 <2.5-3.0 <2.5-3.0 <2.2-2.5 <2.2/2.5
response time t(ns) <25 <25 <25 <25 <25 <25
Intercepting area of access wire(mm²) ≥16 ≥16 ≥10 ≥10 ≥10 ≥10
Intercepting area of grounding wire(mm²) ≥25 ≥25 ≥16 ≥16 ≥16 ≥16
Front-end recommended series fuse 250 200 160 125 100 100
work environment(℃) -40~+70
Relative humidity ≤95%(25℃)
Installation matters

The TNR-B series protectors are installed at the front end of the protected equipment in parallel. The wires must be similar to the power lines. The total length should be controlled within 0.5 meters, and the wires should be short and straight. The front end of the protector should be connected in series with a corresponding air switch or fuse. The power supply must be disconnected when installing.

Fault diagnosis of protector:
First, the fast indicator window is green (normal), when the module becomes red after deterioration, it must be replaced in time.
Two, the base has a remote alarm connection, for one often open a often closed dry contact, failure when the state flipped.

Characteristics of Kevin connection

The Kevin connection is a common wiring method for the surge protector in the installation and use. This connection mode can effectively reduce the residual voltage value of the protected device's lightning overvoltage, and match it with the voltage protection level Up of the protector, so as to achieve the best protection effect.

Product shape size

Product wiring diagram
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