ZE 5kA Deadfront Elbow Arresters (8132 Series)

“ZE” Series Rated 3-27kVThe type “ZE” arrester incorporates surge protection in a one-piece, shielded elbow housing. It permits arrester installation on standard separable connector bushings, maintaining the dead front concept.

Performance:

The type “ZE” arrester was developed specifically for protection of underground distribution systems. It is installed at the open point of the underground system to prevent voltage wave doubling. When also installed at an intermediate point, voltage reflections from the open point arrester are harmlessly discharged.

The housing, made of peroxide cured EPDM rubber, is totally shielded with a molded conductive EPDM jacket to maintain the dead front concept. The one-piece construction requires no field assembly. The “ZE” dead front elbow arrester is approved by REA.

Durability:

The “ZE” elbow arrester consistently withstands the following minimum design tests:

• High Current-Short Duration: 2 current surges of 40kA magnitude.
• Low Current-Long Duration: 20 current surges of 75 amperes magnitude and 2000 microsecond duration.

Duty Cycle:

22 discharges with a current surge of 5kA magnitude and 8/20 microsecond wave shape.

Following each of these tests, the "ZE" arrester remains thermally stable and the discharge voltage increase at rated current is less than 10%.

Application:

The type “ZE” arrester rated voltage designates the 60Hz voltage applied across the arrester terminals during the duty cycle test. In addition, the type “ZE” arrester Maximum Continuous Operating Voltage (MCOV) designates the maximum power frequency voltage that may be continuously applied across the arrester in service. Selection of the appropriate type “ZE” rating is made on the basis that the maximum continuous line-to-ground voltage on the system does not exceed the MCOV of the arrester.

The 10kV, 18kV and 27kV rated arresters are designed for application on nominal 15kV, 25kV and 35kV UD systems, respectively. The three ratings include standard ANSI/IEEE 386 separable connector interface designs that are compatible with major interface suppliers at each voltage level.

Consult MPS for your specific requirements.