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Arresters >> Station and Intermediate Arresters
ZJP Intermediate Class Polymer Arresters
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Features:
  • The type "ZJP" intermediate class arresters offer the benefits of polymer housings for system voltages up to 46kV.   The arresters are approxiately 1/5 the weight of the porcelain equivalent.  Handling and installation become much easier tasks.  Also, the risk of damage to the housing is reduced compared to porcelain.
Design:
  • The design consists of a number of metal oxide valve elements contained within a fiberglass winding and then inserted into the polymer housing. ZJP arresters are shippped as single units for all ratings. The metal oxide valve elements combine excellent protective characteristics with steady state performance to maximize protection over many years of service.
Performance:
  • ZJP: 3 through 45kV duty cycle rating, 2.55kV through 36kV MCOV for 2.4 through 46kV system line-line voltage.
  • The arrester designs are tested in accordance with the latest industry standards for metal oxide arresters.  The "ZJP" arresters consistently withstand the following minumum design tests.
  1. High Current-Short Duration:  100kA crest
  2. Transmission Line Discharge:  Exceeds ANSI/IEEE and IEC class 2 standard requirements
  3. Nominal discharge current per IEC:  10kA
  4. Minumum energy Capability: 5.0kJ/kV MCOV
  5. Fault Withstand Capability:  20kA rms sym
  6. Working cantilever strength:    720 in. -lbs.

Fault Current Withstand:
  • The severity of a failure depends on the duration and magnitude of the available fault current conducting through the arrester at the time of failure.  This type of arrester, with its polymer housing, eliminates the potential danger of porcelain fragmentation.  The design uses a fiberglass epoxy wrap to relieve the pressure that is present during a failure.
Three Phase Installation Layout:
  • The holes for mounting are .56 inches (14.2 mm) for 1/2" bolts.  Mounting bolts and washers are not furnished with the arrester.

 

Nameplates:
  • In addition to the information that is included on the tripod base, a namelate is attached to the casting to provide all of the required arrester details.  The catalog number, the rated voltage, the maximum continuous operating voltage, and the pressure relief current rating are shown.  The serial number includes information about the time of manufacture.

 
See ZJP Ordering Information link for catalog number selection
                 
English Metric

ZJP Electrical Characterstics
Catalog Number Voltage Rating (Ur) (kV rms) MCOV (Uc) (kVrms) TOV (1 s kV rms) TOV (10 s kV rms) Equivalent F.O.W. kV (Crest) Switching Surge kV (crest) Discharge Voltage (1.5kA) Discharge Voltage (3kA) Discharge Voltage (5kA) Discharge Voltage (10kA) Discharge Voltage (20kA) Discharge Voltage (40kA)
ZJP0003- 3 2.55 3.7 3.5 8.55 6.34 6.79 7.17 7.50 8.09 8.96 10.1
ZJP0006- 6 5.10 7.41 7.04 17.1 12.7 13.6 14.3 15.0 16.2 17.9 20.2
ZJP0009- 9 7.65 11.1 10.6 25.9 19.2 20.5 21.7 22.74 24.5 27.1 30.5
ZJP0010- 10 8.40 12.2 11.6 28.3 21.0 22.5 23.7 24.8 26.8 29.6 33.4
ZJP0012- 12 10.2 14.8 14.1 34.2 25.4 27.2 28.7 30.0 32.4 35.8 40.4
ZJP0015- 15 12.7 18.4 17.5 43.1 32.0 34.2 36.1 37.8 40.8 45.1 50.8
ZJP0018- 18 15.3 22.2 21.1 53.3 38.1 40.8 43.0 45.0 48.6 53.8 60.6
ZJP0021- 21 17.0 24.7 23.5 56.6 42.0 44.9 47.5 49.6 53.6 59.3 66.8
ZJP0024- 24 19.5 28.3 26.9 68.5 50.8 54.3 57.4 60.0 64.8 71.7 80.7
ZJP0027- 27 22.0 31.9 30.4 77.3 57.4 61.4 64.8 67.8 73.2 81.0 91.2
ZJP0030- 30 24.4 35.4 33.7 83.5 61.9 66.2 70.0 73.2 79.0 87.4 98.4
ZJP0033- 33 26.7 38.8 36.9 91.9 68.2 72.9 77.0 80.6 86.9 96.3 108
ZJP0036- 36 29.0 42.1 40.0 98.9 73.4 78.5 82.9 86.7 93.5 104 117
ZJP0039- 39 31.5 45.7 43.5 109 80.5 86.1 90.9 95.1 103 114 128
ZJP0042- 42 34.0 49.4 47.0 117 86.7 92.7 97.9 102 111 122 138
ZJP0045- 45 36.5 53 50.4 125 92.9 99.4 105 110 119 131 148
 

ZJP Physical Characteristics and Clearances
Catalog Number Fig. Voltage Rating (Ur) (kV rms) MCOV (Uc) (kVrms) Height (in) Creepage (in) A (in) R (in) Weight Ea (lbs)
ZJP0003-1231 1 3 2.55 6.8 15.7 9.5 5.5 7.7
ZJP0006-1231 1 6 5.10 6.8 15.7 9.5 5.5 8.1
ZJP0009-1231 1 9 7.65 6.82 15.7 9.5 5.5 8.4
ZJP0010-1231 1 10 8.40 6.87 15.8 9.5 5.5 8.6
ZJP0012-1231 1 12 10.2 6.85 15.8 9.5 5.5 10.7
ZJP0015-1231 1 15 12.7 8.31 20.2 9.5 5.5 11
ZJP0018-1231 1 18 15.3 9.22 22 9.5 5.8 11.4
ZJP0021-1231 1 21 17 10.7 26.4 9.5 6.8 11.9
ZJP0024-1231 1 24 19.5 12.1 30.7 9.5 7.8 14
ZJP0027-1231 1 27 22 13.1 33.7 10.5 8.8 14.7
ZJP0030-1231 1 30 24.4 14.6 38.1 10.5 8.8 14.7
ZJP0033-1231 1 33 26.7 15.9 40.3 10.5 8.8 15.7
ZJP0036-1231 1 36 29 16.8 44.2 12.5 10.8 16.6
ZJP0039-1231 1 39 31.5 18.3 48.6 13.5 11.8 17.5
ZJP0042-1231 1 42 34 19.2 51.4 14.5 12.8 18.4
ZJP0045-1231 1 45 36.5 21.3 54.5 15.5 13.8 19.3
Notes:
1.  These minumum clearances are determined by the protective capabilities of the arresters and  
      they are secondary to any other clearnace requirement that may exist for specific application.
2.  Note: Dimensions on the drawings are in inches (millimeters)
 

ZJP Electrical Characteristics
Catalog Number Voltage Rating (Ur) (kV rms) MCOV (Uc) (kVrms) TOV (1 s kV rms) TOV (10 s kV rms) Equivalent F.O.W. kV (Crest) Switching Surge kV (crest) Discharge Voltage (1.5kA) Discharge Voltage (3kA) Discharge Voltage (5kA) Discharge Voltage (10kA) Discharge Voltage (20kA) Discharge Voltage (40kA)
ZJP0003-- 3 2.55 3.7 3.5 8.55 6.34 6.79 7.17 7.50 8.09 8.96 10.1
ZJP0006-- 6 5.10 7.41 7.04 17.1 12.7 13.6 14.3 15.0 16.2 17.9 20.2
ZJP0009-- 9 7.65 11.1 10.6 25.9 19.2 20.5 21.7 22.7 24.5 27.1 30.5
ZJP0010-- 10 8.4 12.2 11.6 28.3 21.0 22.5 23.7 24.8 26.8 29.6 33.4
ZJP0012-- 12 10.2 14.8 14.1 34.2 25.4 27.2 28.7 30.0 32.4 35.8 40.4
ZJP0015-- 15 12.7 18.4 17.5 43.1 32.0 34.2 36.1 37.8 40.8 45.1 50.8
ZJP0018-- 18 15.3 22.2 21.1 51.3 38.1 40.8 43.0 45.0 48.6 53.8 60.6
ZJP0021-- 21 17 24.7 23.5 56.6 42.0 44.9 47.5 49.6 53.6 59.3 66.8
ZJP0024-- 24 19.5 28.3 26.9 68.5 50.8 54.3 57.4 60.0 64.8 71.7 80.7
ZJP0027-- 27 22 31.9 30.4 77.3 57.4 61.4 64.8 67.8 73.2 81.0 91.2
ZJP0030-- 30 24.4 35.4 33.7 83.5 61.9 66.2 70.0 73.2 79.0 87.4 98.4
ZJP0033-- 33 26.7 38.8 36.9 91.9 67.2 72.9 77.0 80.6 86.9 96.3 108
ZJP0036-- 36 29 42.1 40 98.9 73.4 78.5 82.9 86.7 93.5 104 117
ZJP0039-- 39 31.5 45.7 43.5 109 80.5 86.1 90.9 95.1 103 114 128
ZJP0042-- 42 34 49.4 47.0 117 86.7 92.7 97.9 102 111 122 138
ZJP0045-- 45 36.5 53.0 50.4 125 92.9 99.4 105 110 119 131 148
 
                 

ZJP Physical Characteristics and Clearances
Catalog Number Voltage Rating (Ur) (kV rms) MCOV (Uc) (kVrms) Creepage (in) Weight Ea (lbs) A (in) B (in) Strike (in)
ZJP0003-D005 3 2.55 15.7 4.8 4.6 11.10 6.8
ZJP0006-D005 6 5.1 15.7 5.2 4.6 11.10 6.80
ZJP0009-D005 9 7.65 15.7 5.6 4.6 11.12 6.82
ZJP0010-D005 10 8.4 15.8 5.7 4.6 11.17 6.87
ZJP0012-D005 12 10.2 15.8 7.8 4.6 11.15 6.85
ZJP0015-D005 15 12.7 20.2 8.2 4.6 12.61 8.31
ZJP0018-D005 18 15.3 22.0 8.5 4.6 13.52 9.22
ZJP0021-D005 21 17 26.4 9.0 4.6 15.00 10.7
ZJP0024-D005 24 19.5 30.7 11.1 4.6 16.42 12.1
ZJP0027-D005 27 22 33.7 11.8 4.6 17.41 13.1
ZJP0030-D005 30 24.4 38.1 11.8 4.6 18.88 14.6
ZJP0033-D005 33 26.7 40.3 12.8 4.6 20.18 15.9
ZJP0036-D005 36 29 44.2 13.7 4.6 21.14 16.8
ZJP0039-D005 39 31.5 48.6 14.6 4.6 22.64 18.3
ZJP0042-D005 42 34 51.4 15.5 4.6 23.54 19.2
ZJP0045-D005 45 36.5 54.5 16.4 4.6 25.64 21.3
Notes:
1)  Temporary Overvoltage without any Prior Duty
2)  The equivalent Front-of-Wave is the maximum discharge voltage for a 10kA impulse current wave
      which produces a voltage wave cresting in a 0.5 µsec.
3)  Based on a switching surge current of 500 amperes
 


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