DC air circuit breakers and moulded case circuit breakers
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Innovators in Protection Technology Moulded Case Circuit Breakers Temgpwer & Tern Break

Moulded Case Circuit Breakers for DC350V-600V -"2-3 Moulded Case Circuit Breakers for DC750V-1000V--2-5 Time/Current characteristic curves, Ambient Compensating Curves Connection of conductors to DC circuit breakers -"4-2 DC Air Circuit Breakers Outline Dimensions DC Moulded Case Circuit Breakers Outline Dimensions

Introduction In recent years, as part of the drive to reduce greenhouse gas emissions, significant attention is now being directed towards the energy produced by large-scale photovoltaic (solar), wind, and biomass energy power generation. The total power generation capacity of facilities for these new energy sources is expected to exceed that produced by nuclear energy by approximately 2030. To aid and support these new technologies, Terasaki now offer a new, broad range of dedicated DC air circuit breakers and moulded case circuit breakers. The new range of Terasaki DC circuit breakers are...

General Electrical and electronic equipment used in the advanced information and communications sectors requires a highly reliable power source. Should a power failure occur, and to assist with continuity of electrical power, it is General DC power sources for the Uninterruptible Power Supply (UPS) market 1 standard practice to install an Uninterruptable Power Supply (UPS). A data centre is where Internet servers and other systems for data communications, such as fixed, mobile, and IP telephones are installed. At the data centre, AC power from the main system power source is sent to the...

Moulded Case Circuit Breakers for DC350V-600V 50 125 160 250 400 800 1000 S50-GD Frame size (A) Type Number of poles Ratings Rated current, A Calibrated at 45°C S125-ND S160-ND S250-ND S400-ND S800-ND S1000-ND 3 3 2 3 4 3 4 3 4 3 4 15 40 20 50 30 (40°C only) 2 poles breaker is same outline dimensions as 3 poles breaker. Rated insulation voltage Ui V Rated impulse withstand voltage U imp kV Rated breaking capacity, kA JIS C 8201-2-1 Ann.1 Ann.2 DC IEC 60947-2 Icu/Ics AC 600V 500V 350V 250V 20 (12.5-20) 32 (20-32) 50 (32-50) 63 (40-63) 100 (63-100) 125 (80-125) 20 (12.5-20) 32 (20-32) 50...

Moulded Case Circuit Breakers for DC350V-600V * 2 poles breaker is same outline dimensions as Rated insulation voltage (U\) V_ Rated impulse withstand voltage (^imp) kV BRated breaking capacity, kA_ Weight ({§) marked standard type) kg Front-connected (FC) Terminal screws With extension bars Rear-connected (RC) Flat bar studs Clip-in chassis mount_ BAccessories (optional) Auxiliary switch Shunt trips Undervoltage trips Motor operator Door-mounted (variable depth) H P Toggle extension Mechanical interlock Slide type Link type Wire type Toggle lock Terminal cover For front-connected Interpole...

Moulded Case Circuit Breakers for DC750V-1000V 400 d b 4 4 250 (160-250) 400 (250-400) 630 (400-630) 800 (500-800) 630 (400-630) 800 (500-800) 1150 8 1150 8 1150 8 1150 8 5/5 2 5/5 10/10 10/10 185 260 103 145 5.6 185 260 103 145 5.6 ' 280 273 103 145 11.5 280 273 103 145 11.5 ' ' Adj. thermal, fixed magnetic Grey Yes (Red) Yes Yes Yes Adj. thermal, fixed magnetic Grey Yes (Red) Yes Yes Yes ' BAR BAR Exterior Interior Weight (' marked standard type) kg Connections and Mountings Front-connected (FC) Terminal screws With extension bars Flat bar studs Plug-in (PM) For switchboards For...

Switch-disconnectors for DC800V-1000V 160 400 400 800 800 PVS160-NNL PVS400-NNL PVS400-NNH PVS800-NNL PVS800-NNH 4 4 4 4 4 160 400 400 630 800 630 800 AC DC 800 800 6 2 0.3sec. 8 1150 800 9 5 0.3sec. 8 1150 1000 9 5 0.3sec. 8 1150 800 17 10 0.3sec. 8 1150 1000 17 10 0.3sec. 8 DC DC-22B DC-22A DC-22A DC-22A DC-22A 140 165 68 92 1.9 185 260 103 145 5.6 185 260 103 145 5.6 280 273 103 145 11.5 280 273 103 145 11.5 ' ' Grey Yes (Red) Yes Yes Yes Grey Yes (Red) Yes Yes Yes Frame size (A) Type Number of poles Ratings Rated current, A Rated insulation voltage Ui V Rated operational voltage V Rated...

Time/Current characteristic curves, Ambient Compensating Curves

Time/Current characteristic curves, Ambient Compensating Curves Time/Current characteristic curves, Ambient Compensating Curves Percent Rated Current Percent Rated Current Magnetic trip current (A) Notes : Setting tolerance ±20% Magnetic trip current (A) Notes : Setting tolerance ±20% Percent Rated Current

Time/Current characteristic curves, Ambient Compensating Curves

Time/Current characteristic curves, Ambient Compensating Curves Time/Current characteristic curves, Ambient Compensating Curves Rated current Magnetic trip current (A) Notes : Setting tolerance ±10% at 12000A and ±25% for other settings. Note: Magnetic trip only. Use the external over-current relay. Magnetic trip current (A) Percent Rated Current Notes : Setting tolerance ±20% Magnetic trip current (A) Percent Rated Current Notes : Setting tolerance ±20%

Connection of conductors to DC circuit breakers It is more difficult to interrupt DC current than AC current because DC current does not have a zero point. Therefore for high DC voltages, 3-pole or 4-pole circuit breaker main contacts are connected in series to ensure breaking performance. As illustrated below, the main power conductors for DC-use air circuit breakers, moulded case circuit breakers, and switch disconnectors shall be connected generally as shown below but also depending on the type of breaker, the number of poles, and the DC operating voltage. Non-grounded system Line...

Insulation distance DC600V or less The insulation distances between the breaker and earthed metal parts and insulators shown in the table below must be maintained to prevent arcing faults occurring due to conductive ionised gas. In addition, any exposed line-side conductors must be completely covered, right up the breaker casing or to below the height protected by any interpole barriers. This can done by using an insulation tube or tape, in order to provide positive protection against short circuit or ground fault due to metal chipping, surge voltage, dust particles or salt. If terminal...