HDE CC-III - Distribution/Substation Capacitor Checker

The Cap Check capacitor testers are designed to identify internal problems within a capacitor or bank of capacitors. The instruments are proven to be a valuable asset in maintaining pole-mounted and substation capacitors. Due to incipient faults, a capacitor may fail or rupture upon re-energizing. During product development, it was determined that a minimum of 50 volts must be applied across a capacitor to detect incipient faults due to shorting between individual plates. All Cap Check’s allow for testing from 50 to 480 volts AC.

• Cap Check I is designed to test pole-mounted capacitors. It mounts directly on a truck or trailer and requires12-volt external power.
• Cap Check II is designed to test substation racks of capacitors. It is housed in a case with handles or on a dolly and requires 120-volt external power.
• Cap Check III is designed to test pole-mounted capacitors or individual capacitors disconnected from a substation bank. It is smaller and includes hooks for hanging on the side of a bucket and requires 120-volt external power.

The successful development of Cap Check I for line-type capacitor checking led to the design of the Cap Check II for checking substation capacitors. Cap Check II (either the console or carrying case type) is based on the same principle of operation. A two-man crew can check approximately 500 substation capacitors per day.

Cap Check II Console Version (Cat. No. CC-II/102 - right) offers an all-steel, three-drawer cabinet with an attached two-wheel dolly. The unit comes standard with a digital voltmeter and milliammeter, variac control, circuit breakers, all necessary cordage, current probe, and modified hot stick.

Cap Check II Carrying Case Version (Cat. No. CC-II/100 - below) provides the same features and options as the console version. It is housed in an aluminum carrying case.

Note: Most inverters and generators will not provide a suitable power supply - consult factory

Both versions of the Cap Check II include four sets of cordage. All are 50 feet long (15 meters). Current transformer mounts on a 24-foot long (7.2 meter) sectional hot stick modified for application around capacitor bushing (Included but not illustrated).