SYNCHRONIZABLE CURRENT INTERRUPTERS

The JR-Series Current Interrupters are computer age successors to the CI-30. The use of a

microprocessor plus crystal controlled timing results in a unit which can operate alone or in precise

synchronization with any number of other JR units. This feature facilitates measurement of  

instant-off polarized potentials. The JR-Series is also well suited for use where more traditional

current interrupter applications are required.

SPECIFICATIONS:

DISPLAY:

Custom LCD, wide operating temperature range (-4^๐F  to +185^๐F) with enhanced response time at

extremely low temperatures. Large (.7” high) digits plus equipment status annunciators.

LOGIC/RECALL:

8-bit CMOS Microprocessor; FPROM operating system.

CYCLE RANGE:

Keyboard Programmable: 0.1 to 999.9 seconds in 1 second increments, either “ON” or “OFF” cycle.

AUTO TURN-ON:

Programmable interrupt start time.

ACCURACY:

Timing: 0.5 second maximum variation in 24 hours. Synchronization to within 1 millisecond.

BATTERY:

Sealed, rechargeable with charger.

NIGHT LATCH:

The JR-Series supports 24-hour timing and a scheduled relay closure period. For example, a night latch

time of 1700 could be entered from the keypad, and a start time of 0700. The unit will operate normally

until 1700, at which time the relay will close and will stay latched until 0700 the next morning, then the

normal interrupt cycle will begin again. This feature facilitates full CP polarization during hours when the

survey crews are absent.

RELAY:

JR-1: Latching Type

35A ® 28 VDC or 125 VAC

JR-2: Mercury Plunger Type

100 A @ 48 VDC ……… 100 A @ 120 VAC

75 A @ 75 VDC …………  90 A @ 240 VAC

50 A @ 120 VDC ………   60 A @ 480 VAC

30 A @ 240 VDC ………   40 A @600 VAC