GUARANTEED TECHNICAL PARTICULARS FOR
30KV 10KA CLASS-3 LIGHTNING ARRESTERS
1. Name of the manufacture : LAMCO INDUSTRIES PRIVATE LIMITED.,
B-39, I.E. Sanathnagar, HYDERABAD-018(T.S)
INDIA.
2. Type : Medium Duty Station Class Metal-Oxide
Gapless Lightning Arrester "MORESTER"
type 'SL'.
3. Reference Standard : IEC 99-4 of 2006 / IS-3070 (part-3) 1993.
4. Model (Drg. No.) : 2400300
5. No. of Units : One
6. Rated Voltage : 30 KV
7. Nominal discharge current : 10 KA
8. Reference current : 3 mA
9. Reference voltage : Greater than the rated
Arrester voltage at
reference current
10. Leakage Current at COV : Less than 0.8 mA
11. Max. continuous operating voltage : 24 KVrms
12. Maximum residual voltage for discharge
current of (8/20 micro sec. wave)
i) 5000 Amps : 83 KVpeak
ii) 10000 Amps : 88 KVpeak
iii) 20000 Amps : 95 KVpeak
13. Max. steep front residual voltage at
10KA with one micro sec. rise time : 99 KVpeak
14. Max. switching impulse residual voltage
with 40/80 us wave at 1000 Amps : 73 KVpeak
15. Energy dissipation capability : 9 KJ/KV
(Cumulative of 3 sequential shots)
16. High current 4/10 u sec. test value : 100 KApeak
17. Long duration current tests
i) Current peak : As per discharge Class-3
of IEC 99-4 (Table-4).
ii) Virtual duration : 2400 us
Continued on page...2
(2400300) :: 2 ::
G.T.P 30KV 10KA L.A's (continued..2)
18. Pressure relief class : Class 'A'
19. Short circuit current capability : 40 KArms
20. Partial discharge at 1.05 times MCOV : Less than 10 pC
21. Temporary over voltage withstand
value for
a) 1.0 Second : 34.5 KVrms
b) 10.0 Second : 33.0 KVrms
c) 100.0 Second : 31.5 KVrms
22. Insulation withstand strength of
Arrester housing
i) One minute 50 Hz dry & wet : 110 KVrms
ii) Lightning impulse voltage withstand: 175 KVpeak
23. Nominal Creepage distance : 900 mm
24. Weight of complete unit : 22 ±10% Kgs
25. Height of the Arrester : Refer Drg No. 2400300
26. Minimum recommended centre to centre
spacing between Arresters : 555 mm
27. Clearance required from ground
equipment at various heights of
Arrester unit : 440 mm
28. Earthing arrangement provided for : Ground Terminal Bracket
earthing side of Arrester (Drg. 6220151-A) provided
for connecting earth strip
29. Mounting flange dimensional details : End castings,3 holes(11mmØ)
120 deg apart at 200 mm PCD.
for LAMCO INDUSTRIES PRIVATE LIMITED.
(P.G RAJU)
ASST.MANAGER (D&D)
