Cable protector

Due to electromagnetic induction, the metal shielding layer (or metal sheath) of long-line high-voltage single-core power cable generates induced voltage

Commodity name： Cable protector

Product Details

Summarize

Due to electromagnetic induction, the metal shielding layer (or metal sheath) of long-line high-voltage single-core power cable generates induced voltage, leading to insulation aging, and reducing the insulation grade, resulting in reduced cable life; Once the induced voltage exceeds the sheath breakdown voltage value, the outer sheath is broken down, forming a single-core cable multi-point grounding fault. Therefore, the power industry standard DL/T401 "Guidelines for the selection of High-voltage Power cables" stipulates that a cable sheath protector must be used to limit the induced voltage and fault overvoltage on the metal shield (or metal sheath) of the power cable.

Technical parameter

Model number	System rated voltage kVr.m.s	Power frequency withstand voltage/time kVr.m.s/s	Residual voltage under 10kA lightning impulse current ≤kVp	Dc U1mA reference voltage >kV	2ms square wave flow capacity A	L	The leakage current at 0.75U1mA ≤ μA	Models currently circulating on the market that are not marked according to the national bank standard JB/T8459
LHQ-6	6	1.9/4	4.6	2.1	400	80	50	BHQ、BYL、 FBY、SHQ、 BYLS、 TBP-D
LHQ-10	10	3.6/4	8.7	4.0	400	107	50
LHQ-35	35	5/4	12	5.5	400	134	50
LHQ-110(Ⅰ)	110	5.3/4	12	5.8	400	188	50
LHQ-110(Ⅱ)	110	10/4	25	11.0	400	188	50
LHQ-220(Ⅰ)	220	6/4	15	6.5	400	188	50
LHQ-220(Ⅱ)	220	13.6/4	31	15.0	400	188	50
LHQ-500	500	7.5/4	18 *	8.3Ãr	400	134	50