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Ratings and specifications
INSTALLATION AND OPERATION INSTRUCTIONS
MN280103EN March 2023 www.eaton.com
Ratings and specifications
Check recloser ratings prior to installation.
The recloser must be applied within its specified ratings.
Check data plate ratings and compare with the system
characteristics at the point of application prior to installation.
list the ratings and specifications
for the NOVA NX-STS recloser.
Table 1 . Voltage ratings (kV)
Description
15 kV
27 kV
38 kV
Rated maximum voltage (kV, rms)
15.5
38.0
Nominal system voltage (kV, rms)
14.4
24.9
34.5
Std
Opt
Std
Opt
Std
Opt
Rated short-duration power-frequency withstand voltage (kV, rms)
50
50
60
60
70
70
Rated lightning impulse withstand voltage (kV, peak)
110
125
125
150
170
170
a
For 29.2 kV rated maximum voltage applications, a 38 kV recloser is recommended. Short-circuit breaking current is limited to 12.5 kA in this rating configuration.
Table 2 . Current ratings (amperes)
Description
15 kV
27 kV
38 kV
Std
Opt
Std
Opt
Std
Opt
Rated continuous current (A)
630
800
630
800
630
800
Rated short-time withstand circuit current (kA)
12.5
16
12.5
16
12.5
12.5
Rated peak withstand circuit current (kA peak)
32.5
41.6
32.5
41.6
32.5
32.5
Rated duration of short-circuit (s)
3
3
3
3
3
3
Rated short-circuit breaking current (kA, sym)
12.5
16
12.5
16
12.5
12.5
Rated symmetrical (short-circuit) making current (kA, sym)
12.5
16
12.5
16
12.5
12.5
Rated line charging interrupting current (A)
2
2
5
5
5
5
Rated cable charging interrupting current (A)
10
10
25
25
40
40
a
Other selections may include 800 A continuous current with 12.5 kA short-time withstand circuit current rating, or 630 A continuous current with 16 kA
short-time withstand circuit current rating. All remaining ratings shall follow beneath the short-time withstand circuit current rating as depicted above.
Table 3 . Mechanical ratings
Description
15 kV
(110 kV BIL)
15 kV
(125 kV BIL)
27 kV
(125 kV BIL)
27 kV
(150 kV BIL)
38 kV
(170 kV BIL)
Minimum mechanical/electrical operations without maintenance (C-O) 10,000
10,000
10,000
10,000
10,000
Mass (weight)—kg (lb)
114 (252)
118 (261)
118 (261)
123 (272)
123 (272)
Mass (weight)—kg (lb) with pole-mounting frame
161 (354)
165 (363)
165 (363)
170 (374)
170 (374)
Table 4 . Duty cycle
Type
Percentage of
maximum circuit
interrupting rating
Minimum
X/R ratio
Number of
unit operations
at 12.5 kA
Number of
unit operations
at 16.0 kA
NOVA NX-STS recloser
15–20
4
88
88
45–55
8
112
112
90–100
17
32
32
Total 232
Total 232
Table 5 . Auxiliary switch ratings
Volts
Amperes
Up to 30 Vdc
5 A
Up to 250 Vac
5 A
Minimum applicable load
0.16 A at 5.0 Vdc
