24 new GE station class surge arresters, 209 kV MCOV / 258 kV duty-cycle, for 345 kV systems. Includes 24 matching 990 mm grading rings. Eight complete three-phase sets, ex-stock in the US.

Brand: GE
SKU: 9L11HMA258SA

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Description

Overview

CTG offers a lot of 24 new GE station class surge arresters rated 258 kV duty-cycle and 209 kV MCOV, for 345 kV effectively grounded systems. The lot includes 24 matching 990 mm aluminum grading rings. Together they make eight complete three-phase sets for transformer, reactor, line, or bus protection.

Hubbell Power Systems shipped the material from Centralia, Missouri on June 30, 2026. It is still in the original factory crates and cartons and has not been installed or energized.

Highlights

24 GE station class surge arresters, catalog 9L11HMA258SA
209 kV MCOV and 258 kV duty-cycle rating, for 345 kV systems
Polymer (silicone) housed, IEEE C62.11 station class; packing list also lists IEC line discharge class 4
24 matching 990 mm grading rings included (required at this rating)
Eight complete three-phase sets
New and unused, in original factory crates, shipped June 2026
Ex-stock in the United States; the full lot fits one dry-van truckload

Specifications

Surge arrester (24)

Parameter	Value
Brand / catalog no.	GE 9L11HMA258SA (order ref. 9L11HMA258S)
Manufacturer / shipped from	Hubbell Power Systems, Inc., Centralia, Missouri
Class	Station class, IEEE C62.11; IEC line discharge class 4 (per packing list)
MCOV	209 kV rms
Duty-cycle rating	258 kV rms
System application	345 kV effectively grounded systems (362 kV max. ÷ √3 ≈ 209 kV line-to-ground)
Housing	Polymer (silicone)
Construction	Two-unit stack: 120 kV MCOV unit (PSESVNUAG40120) + 89 kV MCOV unit (PSESVNUAG30089)
Hardware	Standard line and base hardware as packed by the factory
Assembly	Assembled in USA (crate label)
Factory test	Factory "TEST OK" marking on top casting
Crate label date	07/02/2026

Reference performance (OEM catalogue)

Parameter	Value
Energy capability	13 kJ/kV of MCOV
Max. discharge voltage, 0.5 µs	663 kV
Max. discharge voltage, 10 kA (8/20 µs)	563 kV

Reference values come from the manufacturer's published catalogue for the 9L11HMA series. Please confirm them against the OEM datasheet and nameplates before specification sign-off. Catalogue data is not a CTG performance guarantee.

Grading ring (24)

Parameter	Value
Description	Ring, 990 mm grading, arrester, 345 kV, aluminum
Material no.	2728073001 (component of 9L11HMA258S)
Construction	Aluminum tube ring with welded radial mounting brackets, satin finish

Packaging and Shipping

Item	Packing	Weight
Arresters (24)	24 wooden crates, one complete arrester (two units) per crate, stackable on pallets	370 lb per crate, about 8,880 lb total
Grading rings (24)	Four rings per carton, about six cartons, shrink-wrapped pallets	To be confirmed

The full lot fits a single dry-van truckload. Lift-gate and forklift needs are confirmed with the buyer.

Condition and Inspection

Condition: New surplus. New and unused, in original factory crates and cartons. CTG has no information that any unit has been installed, energized, or field-tested.
Quantity: 24 arresters and 24 grading rings per the manufacturer's packing lists, confirmed by physical count at inspection.
Inspection: Buyers or their agents may inspect the lot by appointment. CTG records serial and lot numbers, crate labels, and physical condition in a written inspection record furnished with the order acknowledgement.
Location: United States.

Terms

Pricing on request, per arrester, per three-phase set, or for the full lot.
Sold by CTG as principal, negotiated directly with the purchaser. No intermediaries or commissions.
Offered EXW, USA. CTG-arranged freight available on request.
Subject to prior sale, and to CTG's export control and sanctions screening of the purchaser and end use.

New Surplus GE 345 kV Station Class Surge Arresters, 258 kV DC / 209 kV MCOV, with Grading Rings (24)