ST420B1 series microcomputer line protection device

ST420B1-3
ST420B1-2
ST420B1-1
넳 넲
This series of products are suitable for rated frequency 50/60Hz, rated voltage to AC380V/AC400V low voltage applications. This product integrates protection, measurement, control, management and communication, and is the best choice for intelligence.
This series of products adopts modular design. The products are composed of main body and special current transformer. The products are small in size, compact in structure and easy to install. They can be directly installed and used in 1/4 modulus

    1. Product Features

classification

Function

ST420B1(one-piece)

standard

optional

protection

inverse-time overcurrent protection

√

overcurrent1Section Protection

√

overcurrent2Section Protection

√

Zero-sequence overcurrent1Section Protection

√

Zero-sequence overcurrent2Section Protection

√

current phase failure protection

√

Inverse time zero sequence overcurrent protection

√

leakage protection

under-voltage protection

overvoltage protection

Current quick break protection

√

external fault protection

√

current unbalance protection

√

measurement

three-phase current

√

three-phase voltage

have/Reactive power

power factor/frequency

have/reactive power

leakage current

is/negative sequence current

√

grounding current

√

2-7current harmonic

√

2-7voltage harmonic

Voltage Unbalance Rate

is/negative sequence voltage

switching value input

5DI

Other

relay output (3DO)

√

co-selection relay output (2DO)

RS485InterfaceModbus-RTUAgreement

√

4 ~ 20mAanalog output

screen display

2.8inch large screen

Note: & radic; indicates standard,means optional,-means no such feature.

Product Details

ꄴThe previous one： ST400S Series Microcomputer Line Protection Device
ꄲThe latter one： ST420H Series Microcomputer Line Protection Device

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