HTLS Overhead Conductor Greases

Reliable Protection Grease for High Temperature Low Sag Conductors

HTLS (High Temperature Low Sag) conductors are increasingly used in modern power transmission systems where higher current capacity is required without major changes to existing transmission corridors.

Compared with conventional conductors, HTLS conductors operate at higher temperatures. During long-term operation, the conductor surface, metal interfaces, and connection points may face greater challenges from oxidation, moisture, thermal cycling, and mechanical vibration.

OPSTECH HTLS Overhead Conductor Grease is developed for these operating conditions. The grease is formulated to maintain stable protection performance at elevated temperatures while providing corrosion resistance and lubrication for conductor components.

It is suitable for HTLS conductor applications including ACSS, ACCC, ACCR, and other high-temperature transmission conductors.

Protection Requirements of HTLS Conductors

High operating temperature is one of the main advantages of HTLS conductors, but it also increases requirements for conductor protection materials.

During service, conductors may experience:

Repeated temperature changes caused by load variation
Moisture and pollutants from outdoor environments
Contact between different metals that may lead to galvanic corrosion
Mechanical movement caused by wind vibration

A suitable HTLS conductor grease needs to remain attached to the conductor surface and continue protecting the metal components over many years of operation.

OPSTECH develops conductor protection greases based on practical requirements from power transmission applications, focusing on corrosion prevention, thermal stability, and long service performance.

Main Features of OPSTECH HTLS Conductor Grease

Stable Performance at Elevated Temperature

HTLS conductors normally operate under higher temperature conditions than traditional ACSR conductors.

OPSTECH HTLS grease uses a carefully selected base oil and thickener system to maintain consistency and protective performance during continuous heating and cooling cycles.

Effective Corrosion Protection

The grease creates a protective layer between the conductor surface and external environment.

It helps reduce corrosion risks caused by:

Humidity and water exposure
Salt spray in coastal areas
Industrial pollutants
Aluminum and steel contact corrosion

This protection helps maintain the electrical and mechanical reliability of transmission conductors.

Good Adhesion and Low Oil Separation

For overhead conductor applications, grease should remain where it is applied.

OPSTECH HTLS grease is formulated with good adhesion characteristics and controlled oil separation properties, reducing the possibility of grease migration during long-term operation.

Support for Long-Term Maintenance Reliability

By reducing corrosion and surface degradation, conductor grease can help extend inspection intervals and reduce maintenance requirements for transmission line operators.

Technical Data

Items	OPS20A120	OPS40A120	OPS20A180	OPS40A180	OPS60A180	OPS40A240
Description	20A120	40A120	20A180	40A180	60A180	40A240
Max. Temp. Rating	120°C	120°C	180°C	180°C	180°C	240°C
Min. Temp. Rating	20°C	40°C	20°C	40°C	60°C	40°C
Drop Point	>280°C	>280°C	>300°C	>300°C	>300°C	>330°C
Application	ACSR&OPGW	ACSR&OPGW	ACSR&OPGW	ACSR&OPGW	OPGW	HTLS
EN 50326 Compliant	Yes	Yes	Yes	Yes	Yes	Yes
IEC 61394 Compliant	Yes	Yes	Yes	Yes	Yes	Yes
IGB/T 36292 Compliant	Yes	Yes	Yes	Yes	Yes	Yes

Typical Applications

OPSTECH HTLS Overhead Conductor Grease is mainly used for:

HTLS Conductors
ACSS conductors
ACCC conductors
ACCR conductors
TACSR conductors
Other high-temperature transmission conductors
Conductor Accessories
Compression joints
Dead-end clamps
Suspension fittings
Connection points
Power Transmission Projects
High-capacity transmission line upgrades
Renewable energy grid connections
Long-distance power transmission systems
Areas with high humidity or corrosive environments