300 Series Uniform Strength - Switch & Bus Insulators - A30 Strength Class

Use:

300 Series Uniform Strength Switch and Bus Insulators are available for outdoor and non UV exposed (enclosed) applications.
300 Series insulators are available for 5 kV through 46 kV voltage classes.
300 Series insulators are used primarily as bus supports in switchgear applications, dry type transformers and other custom applications.

Construction:

300 Series Uniform Strength Switch and Bus Insulators are precision engineered to ANSI C29.1-1988
specifications using state of the art Finite Element Analysis (FEA) software.
300 Series insulators are of cast epoxy construction with metallic mounting inserts integrally cast into the unit.
Through use of an integrally cast insert, the need for metallic end caps fixed with adhesives is eliminated.
Adhesives tend to deteriorate over time causing future partial discharge concerns.
This problem is most often associated with porcelain insulator designs.
300 Series insulators’ conical design provides mechanical loading characteristics superior to most polymer insulator designs in the market today.
Mounting configurations are NEMA standard and may comprise of up to 100 different variations.
The deep shed design offers generous creep distances.
The epoxy material is lightweight compared to porcelain, and is self extinguishing when exposed to continuous arcing or constant heating.
Units at 95 kV BIL or greater, with more than two mounting inserts per end, are tied internally to prevent floating of inserts not used.

Identification No.	Dimensions		Strength Class (NEMA)	Creep Distance (in)	Electrical Ratings			Mechanical Ratings
	DIA. (in)	Height (in)			Highest System Voltage (kV)	Impulse Voltage (kV)	60 HZ Withstand 1 min (kV)	Cantilever (lbs)	Tension (lbs)	Compression (lbs)
03-001	5.00	4.50	A30	6.23	8.3	75	26	4500	5000	60000
03-002	5.00	6.00	A30	9.45	15.0	95	36	3500	5000	60000
03-003	5.00	7.50	A30	11.62	20.0	110	50	2800	5000	60000
03-004	5.00	8.75	A30	14.68	25.0	125	60	2400	5000	60000
03-005	5.00	10.50	A30	18.18	38.0	150	80	2000	5000	60000
03-006	5.00	11.00	A30	18.44	38.0	150	80	1900	5000	60000
03-007	5.00	12.75	A30	21.91	38.0	170	80	1700	5000	60000
03-008	5.00	14.00	A30	23.96	48.3	200	100	1500	5000	60000

Uniform Strength Switch & Bus Insulators are tested in accordance with ANSI C29.1-1988.

Mechanical ratings, based on static loading applied in a practically stepless variation,
are provided for design purposes and are considered safe for all insert configurations.

Actual values attainable will vary with each application and type of loading condition.

Impulse wave 1.2 x 50 µS.

Frequency 60 Hz.

	000	001	See 001	002	See 002	003	004
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