ACB　reverse connection

For ACB, Line and Load are not defined on the main circuit terminals. Reverse connection is available without any limitation. More Details >>

Switch disconnector

Switch disconnector is a switch compatible with IEC 60947-3 standard, and it has no overcurrent tripping element. Please use it as a switch with large switch... More Details >>

Wrong connection in reverse

It may not trip a fault current or degrade insulation after tripping. When you connect the device in reverse, you must select a reverse-connectable model. More Details >>

PAＬ（Pre-Alarm Module）

Pre-Alarm is a function which outputs an alarm if the load current exceeds setting current value. This is useful for securing continuous power supply and pre... More Details >>

IEC60947-2 standard

IEC 60947-2 is an international standard for circuit breakers. The rated voltage for the applicable circuit breaker is 1000V AC or less, or DC 1500V DC or le... More Details >>

AL/AX/SHT/UVT terminal markings and wire colors

The color of terminal identification tube and lead wire is same.For one AL switch, 98/ALa terminal : red, 96/ALb terminal : blue, 95/ALc terminal : grayFor S... More Details >>

Inverse time delay operating characteristic

It is a characteristic that operating time inversely become shorter as current increases. For Molded Case Circuit Breakers, protection characteristic meeting... More Details >>

AC Breakers used at DC circuit

It is not possible to use a circuit breaker for AC in DC circuit. Since the Arc-Extinguishing Device structure of circuit breaker for DC is different from th... More Details >>

Calorific value of the circuit breaker

1. The internal resistance (per pole) is described in the catalog and technical notes. 2. Power consumption (W) = RI^2 x Poles = Resistance (Ω) x Load curre... More Details >>

ACB　terminal connection

Horizontal connection type (standard: AE-SW up to 3200A except 2000-SWA), Vertical connection (VT) type (standard: 2000-SWA,4000-SWA -6300-SW) and Front conn... More Details >>