V-LIM Electrical Line Integrity Monitoring Module.
Providing Accurate Electrical Integrity Data
Over a Wide Range of Insulation Resistance Levels
Specifically designed to address the demands of the Oil & Gas sector, the V-LIM is an accurate and precise electrical cable integrity. It supports you through the system lifecycle: proactive maintenance on greenfields, informed decision making on brownfields, and prolonging the life of degraded cables through the use of V-LIFE. Two V-LIM product generations are available:
V-LIM: Advanced IR monitoring for topside systems, delivering real-time visibility, early fault detection, and exceptional accuracy.
V-LIM2: The latest generation, designed to support analysis and automation. Enhanced monitoring capabilities and an intuitive interface for streamlined decision-making.

Precise and Accurate Electrical Cable Integrity Monitor.
Long term operation and exposure to harsh environmental conditions causes insulation degradation in cables and other electrical equipment over time. With its precise and accurate measurements of Insulation Resistance, Capacitance and other advanced electrical parameters, V-LIM not only provides a better picture of the health of the system over time, but also provides opportunities to identify problems before they arise. This allows proactive and more cost effective intervention to be undertaken based on risk and asset condition assessments rather than relying on reaction to failures after they have occurred.
The V-LIM unit employs Digital Signal Processing techniques which facilitate trending and characterisation of the system condition with reliable fault disclosure over a wide measurement range.
V-LIM has two independently adjustable alarms and relay contacts set to predefined user-configurable thresholds. When the V-LIM detects that the IR has fallen below the thresholds, the alarms activate, and the relays operate. V-LIM offers an overall system condition as a standalone unit which can be interrogated using the module’s touch LCD panel, or downloaded easily via USB Ports.
Our Next Generation Monitor: V-LIM2
V-LIM2 is our latest generation technology, designed to support analysis and automation. It includes all of the current capabilities of V-LIM, with enhanced IR monitoring range, power monitoring capability and an improved intuitive interface for streamlined decision-making.
Our customers can easily upgrade from V-LIM or other panel-mounted IMD Installations to V-LIM2.
Whether for greenfield projects or aging brownfield assets, V-LIM2 is built to meet the evolving needs of the industry. Combined with PlatformVi, Viper’s intuitive data platform, operators can monitor trends, and make informed decisions quickly, such as enabling automated IR recovery through remote V-LIFE activation.

Intelligence Installed: Viper Innovations' Subsea Solutions deliver a state-of-the-art technology ecosystem designed to safeguard subsea cable integrity
Be V-LIFE Ready
Prevent Cable Failures, Protect Operations 
In subsea energy operations, unplanned downtime is costly and disruptive. Cable faults, such as water ingress or declining insulation resistance (IR), jeopardise reliability, safety, and profitability. Why wait for failures when they can be prevented?
With our advanced line insulation monitor V-LIM or next-gen product V-LIM2, or our subsea V-SLIM monitors already installed, V-LIFE, a preventative and protective ‘healing’ solution for low IR in umbilical cables, can be activated quickly, restoring system health before system failure. This is the essence of being V-LIFE ready: always prepared, with a solution ready to protect your operations.
To discover more about how to make your system V-LIFE Ready or view our Subsea Solutions Brochure.
Product Features.
Key Electrical Interfaces:
- Input Power Supply: 100V to 240V AC, 140V to 335V DC, ±10% tolerance
- Input Power Supply for 24V: 24DC, ±20% tolerance
- Power Consumption: 5W typical 14W maximum (V-LIM) and 15W maximum (V-LIM2)
- Line Voltage: Up to 1000V DC / single-phase AC 50-400Hz
Up to 690V 3-phase AC 50-400Hz
Measurement Parameters:
- Insulation Resistance (V-LIM): 1kΩ to 1GΩ
- Insulation Resistance (V-LIM2): 1kΩ to 10GOΩ
- Insulation Capacitance: 0.1µF to 150µF
- Line Voltage: 50 to 1000V AC/DC
- Line Frequency (V-LIM): DC, AC 47 – 410Hz
- Line Frequency (V-LIM2): DC, AC 50 – 400Hz
Compliant with Insulation Monitoring Standards:
- IEC 61557-1
- IEC 61557-8
For the comprehensive product specification, please refer to the product datasheet in the resources tab.
V-LIM
All items are typically available ex-stock.
Two V-LIM models available with different power supply options:
- Part Number: VA-223619 for power supply input:
- 110V to 240VAC 50/60Hz
- 120V to 370VDC
- Part Number: VA-223619-24V for power supply input:
- 24V DC
Accessories:
- Split line Current Transformer for line current measurement capability: Part Number: VA-229986
- A range of standard interface panels and cable harnesses are available for retrofit applications in all major SPCS vendor Electrical Power Unit (EPU) cabinets.
V-LIM2
- VA-231411 V-LIM2
Please complete the V-LIM product questionnaire under the resources tab and email to sales@viperinnovations.com to allow us to provide a tailored quotation to match your specific project requirements.