Description

Bolt-On Split Core Current Transformer

SPD Series Split Core CT Bolt-On Type

The SPD Series bolt-on split core current transformer is designed for retrofit metering and monitoring applications where the existing cable or busbar should not be disconnected.

The split-core construction allows installation around existing conductors, making it suitable for panel upgrades, sub-metering, energy monitoring, EMS, BMS, SCADA and IoTWatt 4.0 metering projects.

5A to 5000A Primary Range 5A / 1A Secondary Bolt-On Split Core Retrofit Friendly Busbar / Cable Use EMS / BMS Ready IoTWatt 4.0 Ready

SPD Series bolt-on split core current transformer

Product Overview

Split core CTs are useful when energy monitoring or metering points must be added to existing electrical installations. The bolt-on construction provides a secure mechanical assembly around the conductor while avoiding the need to dismantle busbars or disconnect power cables.

The SPD Series is commonly used with multifunction meters, power meters, energy management systems, demand monitoring systems, data loggers, PLCs, BMS, EMS and IoTWatt 4.0 projects.

Positioning: Retrofit bolt-on split core CT for metering, sub-metering, energy monitoring and industrial electrical measurement applications.

Why Split Core CTs Matter

In existing panels, downtime and rewiring cost can be the biggest barrier to adding metering points. A split core CT helps reduce installation complexity.

Retrofit metering
No cable disconnection
Reduced shutdown work
Feeder monitoring
Machine monitoring
Sub-metering
Energy audit points

Key Features at a Glance

Bolt-On Split Core Design Allows installation around existing cables or busbars without removing the conductor.

Wide Primary Current Range Available from low-current feeder applications up to high-current busbar monitoring points.

5A or 1A Secondary Compatible with common multifunction meters, power meters and energy monitoring devices.

Metering Accuracy Options Typical accuracy range of 0.5% to 1% depending on CT ratio, burden and model selection.

Panel Retrofit Friendly Useful where shutdown time is limited or busbar dismantling is not practical.

IoTWatt 4.0 Ready Suitable for feeder-level measurement points in Digital Energy Audit and EECA reporting projects.

General Specifications

Parameter	Specification
Product Type	Bolt-on split core current transformer.
Rated Primary Current	5A to 5000A, depending on model and CT ratio.
Secondary Output	5A or 1A.
Accuracy	0.5% to 1% from 10% to 150% of full-scale range, depending on model and burden.
Rated Test Voltage	3kV AC for 1 minute.
Rated Short-Time Thermal Current	60In.
Rated Dynamic Current	2.5Ith.
Rated Voltage	0.72kV AC.
Operating Temperature	-10°C to +50°C.
Housing Rating	UL 94V0.
Safety Factor	FS 5.

Model and Dimension Selection

Model	Outer L	Outer W	Outer H	Window a	Window e	Install M	Install N	CT Ratio	Burden
SPD-XH-30x20	90 mm	40 mm	110 mm	20 mm	30 mm	49 mm	52 mm	100/5 to 400/5	1VA to 2.5VA
SPD-XH-80x50	115 mm	37 mm	156 mm	50 mm	80 mm	81 mm	50 mm	250/5 to 1000/5	1.5VA to 5VA
SPD-XH-80x80	145 mm	37 mm	159 mm	80 mm	80 mm	111 mm	45 mm	250/5 to 1000/5	1.5VA to 5VA
SPD-XH-120x80	145 mm	37 mm	200 mm	80 mm	120 mm	111 mm	45 mm	500/5 to 1500/5	2.5VA to 7.5VA
SPD-XH-160x80	185 mm	53 mm	248 mm	80 mm	160 mm	118 mm	45 mm	1000/5 to 3000/5	10VA to 15VA

Selection note: Select the CT based on conductor or busbar size, primary current, required secondary output, total burden of the connected meter and cable, and required accuracy class.

Dimension Reference

Confirm the available panel space, conductor size and mounting clearance before selecting the CT window size. For busbar systems, check both the conductor dimension and the available installation access.

SPD Series split core CT dimension drawing

Why Use Bolt-On Split Core CTs?

Existing Panels Useful for retrofit projects where cables or busbars are already installed.

Lower Installation Disruption Reduces the need for conductor removal compared with solid-core CTs.

Feeder-Level Visibility Supports DB, MCC, tenant, process, machine and utility feeder monitoring.

Energy Audit Ready Useful for creating additional metering points for digital energy audit evidence.

Different Window Sizes Available in multiple window dimensions for cable and busbar applications.

Meter Integration Works with compatible multifunction meters, RS485 meters and IoTWatt 4.0 gateways.

Installation and Commissioning Notes

Correct CT selection and installation are important for reliable measurement. The CT ratio must match the meter setting, the secondary wiring must be correctly connected, and the CT should be installed in the correct direction where power direction or kW measurement is required.

Confirm primary current rating
Confirm 5A or 1A meter input
Confirm CT ratio setting
Check burden and cable length
Install with correct polarity
Check kW direction
Check phase matching
Short CT secondary safely during maintenance

Safety note: CT installation should be carried out by competent electrical personnel. For 5A / 1A CTs, the secondary circuit must not be left open while current is flowing in the primary conductor.

Integration with Energy Monitoring Systems

The SPD Series can be used with compatible power meters, multifunction meters and energy monitoring systems. It is suitable for IoTWatt 4.0 Digital Energy Audit and energy management projects where multiple feeders, machines, DBs or utility sections need to be monitored.

Multifunction meters
Power meters
kWh meters
RS485 meters
IoTWatt 4.0 gateways
Feeder kW / kWh monitoring
Demand monitoring
Tenant allocation
Energy audit measurement
EECA reporting support
Savings verification

Recommended CT Selection Checklist

Confirm conductor / busbar size
Confirm primary current range
Confirm CT ratio
Confirm 5A or 1A secondary
Confirm connected meter burden
Confirm cable length burden
Confirm accuracy class need
Confirm panel space
Confirm CT polarity direction
Confirm phase matching
Confirm safe access
Test current and kW reading

SPD Series CT Supply and Energy Monitoring Integration

Saturn Pyro supports SPD Series bolt-on split core CTs for energy metering, sub-metering, EMS, BMS, power monitoring, IoTWatt 4.0 metering points and industrial retrofit projects in Malaysia.

Enquire Now

More detail about Saturn Pyro Sdn Bhd

Split Core CT (Bolt-On SPD Series)