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BY20 Type Surge Protective Device

BY20 Type Surge Protective Device
BY20 Type Surge Protective Device
Offer Type: Sell
Offer Post Time: 2009-08-25
Expiration Date: 2010-05-08
Details: BY20 type surge protective device (short name "SPD") is suitable for AC 50/60 Hz, 380V and the following electric power systems, such as TT, IT, TN-S, TN-C, TN-C-S. It protects the electric network shocked by the thunder or over voltage.

Working condition:
1. Height: Not more than 2000m
2. Operating temperature: Normal -5~+40ºC Enlarge range: -40~+80ºC
3. Relative humidity: On condition that room temperature 30%~90%
4. Installed at no notability shocked and virated place
5. Don't be contained in explosion medium, the medium such as air and dust (including conductive dust ) shouldn't come to the degree that can corrode metal or damage insulation.
Tripping device
There's tripping device designed on the modular of the protector. When the protector is over heat or shocked, the tripping device can automatically separate it from the electric net, at the same time showing the indication signal. It's green when the protector is normal, red when tripping.
Remote signaling contact
The products can be produced available with the accessory of remote signaling contact. If one or more of modular of the protector is in malfuction, the contact will be closed, and sending the malfunction signal.
Principal parameters
Maximum continuous operating voltage: Uc 275 440 V~
Test grade: II
Voltage protect level: Up¡Ü 1.2 1.8 2.0 kV
Maximum discharge current: (8/20¦ÌS) Imax 12 15 40 62kV
Nominal discharge currrent: (8/20¦ÌS) In 8 5 15 30kA
Remote communication terminal parameter
Type of remote communication terminal    Active
Terminal normal power  UN/IN  AC: 250V/0.5A DC: 250V/0.1A, 125V/0.2A, 75V/0.5A
Conductor section    Maximum single line: 1.5mm2

Main Structure and Operating Principle
In three-phase four- line system, three phase lines and one zero line are connected protective device to the earth cable. (figure 1 ). In normal situation, the protective device is high resistance, when the over voltage brings for electric network shocked by thunder or other reasons, the protective device will rapidly transmit in ns, then lead the voltage into earth and protect the electric equipment. As the surge voltage through the protective device and after disappear it will recover to high resistance and not influence the normal operating.

1. There's no need to adjust the protector after installation.
2. The protector can automatically protect the electric net should it's installed rightly.
3. When operating, check whether the modular scutcheon is red, at the same time check whether the    indication red light is lighting, then can change the malfunction device.

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