Low-voltage Brief Catalogue Protection Relay
Protection Relay
083 Low-voltage Brief Catalogue
084
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NJB1-YW Floatless Relay
NJBK7 Motor Protection Relay
• NJB1-YW Floatless Relay is applicable for water level automatic control in industrial facilities & equipments, civil water tower, high cistern, underground conservation pool, etc. • The control of automaitic water supply or drainage may be achieved by a simgle operation of the function switch without modifying the user's connectiong conditons. • This product is not applicable for water level control of flammable and explosive liquid, such as oil, chemical liquid, etc.
• Standard: IEC 60947-4-1 • Rating current: 1A~800A, Rogowski coil is applied for high curren.t • Rating control voltage: 50Hz AC220V, AC230V, AC240V, AC380V, AC400V, AC415V. • Trip class: 5, 10A, 10, 20, 30. • Various motor protection functions, with RS485 interface and 4mA-20mA analog transmission interface for communication and monitor. • With LED display and setting button, smaller size can save installation space. • Can operate for auto-coupling or star-delta start.
NJB1-YW
NJBK7
NJB1-X Relay (Three-Phase Unbalance, Phase Sequence, Phase Failure Protection)
NJBK1 Series Motor Protector
• Standards compliant: GB 14048.4, IEC 60947-4-1 • Rated control supply voltage: 50Hz AC380V, AC220V • Maximum rated working current up to 400A • Trip grade: Level 5, level 10A, level 10, level 20 and level 30 adjustable
• NJB1-X relay are applied in AC380V~480V control circuits at a frequency of 50Hz/60Hz as protection elements of phase sequence, phase failuire and phase unbalance,making or breaking circuits. • The relay with the true effective value of three phase AC voltatage provides more reliable operating protection. The products meet the requirements of standard IEC 60947-5-1.
• Overload, open phase and three-phase current imbalance and other protection functions • Nixie tube displays the motor working condition and the maximum phase current value • Linear scale knob adjustment • With test/reset buttons • Pluggable terminal blocks • With the function of protection contact will release with no control supply voltage
NJB1-X
NJBK1
NJB1-X1 Relay (Phase Sequence, Phase Failure Protection)
• NJB1-X1 relay is used as an phase sequence and phase failure protection device in control circuits with an AC voltage of 200V~500V and a frequency of 50Hz or 60Hz to make and break the circuit. • It cannot monitor the phase failure of motor load. • The products meet the requirement of standard IEC 60947-5-1
NJB1-X1
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