Eaton Cooper Power Series MHD 9 kV Heavy-Duty Surge Arrester 7.65 kV MCOV for Transformer Protection

Product Specifications

Product Name: Eaton Cooper Power Series MHD Molded Polymer-Housed Surge Arrester

OEM Catalog Framework: UltraQUIK Configurable MHD Series (Covers ratings from 3 kV to 36 kV)

IEEE Std C62.11 Classification: Heavy-Duty Distribution Class (10 kA Nominal Discharge Current)

High Current Impulse Withstand: 100 kA Crest (Utilizing 4/10 µs waveshape preconditioning parameters)

Fault Current Short-Circuit Rating: 20 kA rms Symmetrical (Verified non-fragmenting duration of 0.2 seconds)

External Insulation Housing: Direct-molded non-aging silicone rubber polymer moisture barrier

Available Voltage Series & Creepage Housing Matrix

The Eaton Cooper Power series MHD heavy-duty distribution arrester infrastructure is structured across highly configurable voltage classes and specific leakage profiles to meet global grid vulnerabilities:

• Low-Voltage Utility Matrix (3 kV – 6 kV Ratings): Utilizing compact H1 structural housings providing a verified 14.8-inch creepage distance for lower distribution thresholds.
• Mid-Range Utility Matrix (9 kV – 12 kV Ratings / This Profile): Utilizing heavy-duty H2 structural housings delivering an extended 19.7-inch creepage profile — perfectly calibrated for 7.65 kV to 10.2 kV MCOV applications.
• Sub-Station Sub-Surface Matrix (15 kV – 18 kV Ratings): Utilizing H3 high-creepage structures offering a 24.6-inch leakage boundary for severe environmental exposure.
• High-Stress Grid Matrix (21 kV – 36 kV Heavy-Duty Ratings): Utilizing specialized H5, H6, and H7 housing profiles scaling up to 49.2 inches of creepage to manage extreme pollution and tracking risks.

Material & Structural Characteristics

• Direct-Molded Silicone Rubber Housing: High-molecular-weight silicone polymer chemically molded directly onto the internal module to completely eliminate internal air voids and form an absolute moisture-proof seal against environmental degradation.
• Composite Weave Wrapped MOV Core: Premium metal oxide varistor disks stacked with precision-machined aluminum end electrodes and wrapped tightly in a high-tensile composite fiberglass weave to create an unyielding, high-density MOV disk module.
• Stainless Steel Hardware Interface: Equipped with an M10 stainless steel top stud, stainless steel nuts, and heavy-gauge wire clamps to eliminate chemical oxidation and ensure reliable torque retention during structural installation.
• Integrated Black Isolator Assembly: Rugged ground lead disconnector mechanically joined via a stainless steel grounding stud, ensuring reliable disconnection during thermal runaway events while maintaining total system stability.

Product Functions

1. Overvoltage & Lightning Surge Attenuation: Acts as a high-speed steady-state self-impedance valve that instantaneously limits severe overvoltages by safely shunting steep lightning impulses and switching surges down to earth terminals.

2. Immediate Micro-Leakage Recovery: Returns seamlessly to an open-circuit state with near-zero leakage current the exact microsecond the surge potential passes, maintaining nominal dielectric grid integrity without thermal drift.

3. Fault Current Isolation Protection: Systematically withstands maximum grid short circuits up to 20 kA without expelling internal component fragments, protecting adjacent high-value substation apparatus from collateral damage.

Key Features

1. UltraQUIK Modular Versatility: Fully configurable terminal paths offering diverse line leads, copper transformer grounding straps, NEMA cross-arm brackets, and dedicated transformer bracket options for streamlined field mounting.

2. Self-Adjusting Wildlife Protection: Ships standard with a universal wildlife protector featuring dual valve style self-adjusting slits that accept conductors up to 0.75 inches while preventing animal-initiated line outages.

3. Rigorous Batch Destructive Testing: Every individual production run undergoes comprehensive micro-ohm reference voltage screening, partial discharge verification, and batch thermal stability preconditioning to ensure absolute reliability.

4. Industrial Ocean-Safe Packaging: Packed in high-strength individual cartons layered inside rugged quadwall master container crates with skid bottoms, preventing internal physical friction during long-distance global transit.