Split Core CT Supplier & Exporter for Palembang

Precision Current Transformation, Retrofit Energy Metering & Distribution Protection for South Sumatra's Industrial Hub

24+ Years Manufacturing
5,700 m² TÜV Verified Facility
0.5 Class Metering Accuracy
5 Pcs Low Trial Batch MOQ
Catalog Selection

Modular Protection, Metering & Control Products

Engineered to work seamlessly alongside high-precision split-core current transformers in sub-distribution switchboards, energy audits, motor centers, and PV arrays across South Sumatra.

Engineering Insight

Split Core CT Dynamics in Palembang’s Heavy Industrial Grid

A technical guide on deploying non-intrusive current measurement, avoiding phase shift saturation, and overcoming tropical humidity challenges across Sumatra’s commercial backbone.

Zero-Downtime Retrofitting

Palembang's economy is sustained by continuous-process operations such as ammonia and urea manufacturing at PT Pupuk Sriwidjaja (PUSRI), state-owned oil refining at Pertamina Plaju, rubber processing, and palm oil mills (PKS). Shutting down a 400V or 6.6kV busbar to thread solid-core transformers through multi-cable feeders causes prohibitive hourly financial losses.

Split Core Current Transformers (CTs) eliminate downtime entirely. Utilizing interlocking high-permeability silicon steel or nickel-alloy permalloy cores, engineers can snap the transformer securely over live primary busbars or insulated cables without lifting incoming lugs or violating PLN compliance seals.

Sub-Harmonic Resilience

Heavy inductive loads across Musi River shipyards, coal loading conveyor belts along the Keramasan terminal, and deep-well submersible pumps introduce severe 3rd, 5th, and 7th order harmonics. Standard magnetic cores saturate quickly under harmonic distortion, skewing current ratios and leading to faulty power-factor correction penalties.

Our split-core sensor assemblies feature precision-lapped air gaps and linear excitation thresholds, maintaining Class 0.5 and Class 1.0 accuracy even in environments characterized by Total Harmonic Distortion (THD-i) exceeding 18%.

Tropicalized Insulation

Palembang has an equatorial rainforest climate with ambient relative humidity consistently oscillating between 78% and 95%, accompanied by high condensation cycles inside outdoor LV switchboards. Exposure to airborne moisture and sulfur vapors from chemical processing rapidly degrades low-grade nylon split-core housings.

TMB’s supplied units utilize flame-retardant UL94-V0 polycarbonate casings vacuum-impregnated with epoxy resin. This prevents hygroscopic swelling, protects internal secondary coils from dielectric breakdown, and preserves transient impulse ratings up to 3kV/1min.

Series Window Size Primary Current (A) Secondary Output Accuracy Class Standard Application Scenario
CTS-16 (16mm ⌀) 5A – 120A 0-50mA / 0.333V AC Class 0.5 / 1.0 Branch distribution, energy audit loggers, server rack metering
CTS-24 (24mm ⌀) 50A – 300A 1A / 5A / 0.333V AC Class 0.5 Commercial HVAC metering, secondary distribution panels, solar string
CTS-36 (36mm ⌀) 100A – 600A 1A or 5A AC Class 0.5 Rubber drying mills, feed mills, PKS motor control centers (MCC)
CTS-50 (50mm ⌀) 250A – 1000A 5A AC Class 0.5 / 5P10 Low-voltage main distribution panels (LVMDP), transformer incomers
CTS-80 (80×50mm Rect.) 500A – 2500A 5A AC Class 0.5 / 10P5 Flat busbars, coal transport terminal feeders, refinery substations
Localized Deployment

Engineered for South Sumatra's Critical Sectors

From the banks of the Musi River to industrial estates across Gandus and Tanjung Api-Api, our protection and sensing products solve rigorous field challenges.

Palm Oil Mills (PKS) & Biomass

Processing facilities across Banyuasin and Musi Banyuasin depend on heavy mechanical screw presses and digesters. High motor loads demand continuous current monitoring to avoid jamming and motor burnout. Split core CTs integrated with our TORT7 multi-function timing relays and contactors allow plant operators to balance phase currents, trip high-slip conditions, and automate de-sludging schedules without interruption.

Commercial BMS & Cold Storage

Warehousing facilities handling fresh seafood, meat, and processed agricultural commodities around Boom Baru Port require round-the-clock temperature and energy supervision. Bluetooth-enabled smart switches and DIN rail sub-meters paired with clamp-type split core CTs allow facility managers in Palembang to track compressor efficiency, detect phase imbalance, and automate load-shedding cycles remotely via mobile devices.

Commercial Solar C&I Retrofits

Under Indonesia's net-metering framework and regional industrial decarbonization initiatives, rooftop solar adoption is climbing in South Sumatra. Retrofitting existing main switchboards with split core CTs provides bidirectional power feeds to export controllers without disconnecting factory busbars. Together with our 1000V DC MCBs and IP65 PV combiner systems, installations maintain strict compliance with local utility regulations.

Market Evolution

Regional Trends Driving Smart Current Sensing (2025–2030)

Key drivers modernizing South Sumatra's electrical power grids and industrial facilities.

ISO 50001 & Energy Auditing

Indonesian industrial regulations are increasingly mandating systematic energy audits for energy-intensive sectors (fertilizer, pulp, paper, and mining). Facilities throughout Palembang are shifting from monthly aggregated bulk metering to granular departmental sub-metering. Split-core CTs provide the most cost-effective retrofit mechanism to feed IoT gateways without production halts.

Grid Resilience Against PLN Transients

While the South Sumatra transmission infrastructure has advanced with the Trans-Sumatra HVDC grid connection, local distribution networks still experience frequent switching transients, lightning-induced voltage sags, and phase imbalances. Combining split core sensing with automatic transfer switches (ATS) and over/under voltage relays prevents motor burnouts across Palembang's light industrial parks.

Decentralized Mini-Grids & Micro-Hydro

Remote agricultural plantations and processing outposts away from Palembang's city center rely on hybrid microgrids combining diesel generators, biomass, and solar PV. Split core CTs with 1A and 5A secondary outputs enable synchronized load-sharing panels to shift loads automatically based on real-time operational thresholds.

Engineered by Zhejiang TMB Electric Co., Ltd.

Headquartered in Liushi Town, Wenzhou—the electrical manufacturing capital of China—TMB brings over 24 years of manufacturing expertise directly to Indonesian contractors, panel builders, and trade distributors. Verified on-site by TÜV Rheinland, we maintain comprehensive quality control across all circuit protection, timing, and current transformation devices.

By producing contact assemblies, arc chambers, and housings within an integrated ecosystem, we ensure competitive pricing, short delivery windows to Indonesian ports via Jakarta or Boom Baru, and absolute unit-to-unit consistency.

  • Manufacturing Legacy24 Years Continuous Operation
  • Facility Scale5,700 m² Plant (92 Staff)
  • Audit VerificationTÜV Rheinland On-Site Assessed
  • Verified Annual ExportUS$ 3,304,733
  • CertificationsCE, RoHS, ISO9001 Alignment
  • OEM / ODM CapacityCustom Labeling, Housing & Ratios
  • Minimum Trial OrderFrom 5 Units on Catalog Items
  • Logistics to SumatraSea Freight / Direct Air to PLM
Procurement Guidance

Frequently Asked Questions by Indonesian Buyers

Practical engineering questions commonly raised by electrical contractors, switchboard builders, and procurement officers in South Sumatra.

What is the key difference between choosing a 1A vs. 5A secondary split core CT for Palembang plants?
A 5A secondary output is the historic standard for panel-mounted analog ammeters and local digital power meters located within 2 to 3 meters of the transformer. However, in large Palembang facilities—such as sprawling palm oil mills or petrochemical tank farms where the CT is installed on outdoor motor disconnects and the monitoring panel is located 30 to 100 meters away—a 5A secondary experiences substantial I²R lead wire resistance losses, degrading measurement accuracy. In long cable runs, specify a 1A secondary or a 0.333V AC voltage-output CT to reduce wire burden, minimize cable heat, and maintain Class 0.5 metering integrity.
Can split core CTs be safely installed without de-energizing the main power feeder?
Mechanically, split-core CTs are designed specifically to clip around insulated conductors without cutting the cable or disconnecting terminal lugs. However, per Indonesian standard PUIL (Persyaratan Umum Instalasi Listrik) and strict site safety protocols, hot-work personal protective equipment (PPE Class 2/3) must be worn. Critically, never allow the secondary terminals of a current-output (1A/5A) CT to remain open-circuited while the primary line is energized. An open secondary generates hazardous kilovolt-level peak voltages across the terminals, risking dielectric puncture and electric shock. Our units feature built-in transient voltage suppressor (TVS) diodes or shorting blocks upon request.
How do you prevent measurement drift caused by dirt, grease, and humidity in Sumatra?
In rubber factories and agricultural processing plants near the Musi River, fine particulate dust, moisture, and chemical vapors can settle on the mating surfaces of the split core during retrofitting. Any air gap or debris separation between the two core halves increases magnetic reluctance, causing significant phase angle errors and under-reporting of power factor. Our split-core units incorporate corrosion-resistant core laminations, silicone grease sealing barriers on precision-milled core faces, and heavy-duty stainless-steel or phosphor bronze snap-locks to ensure core faces maintain intimate, spring-loaded contact over years of thermal cycling.
How are import duties, shipping, and customs clearance handled for shipments to Palembang?
Shipments can be routed directly via ocean freight to Boom Baru Port (Palembang) through transshipment at Singapore or Jakarta (Tanjung Priok), or dispatched via air freight to Sultan Mahmud Badaruddin II International Airport (PLM) for urgent samples. We provide full export documentation including commercial invoices, packing lists with accurate HS codes (8504.31 for low-power current transformers, 8536.20 for circuit breakers), Certificate of Origin (Form E for ASEAN-China preferential tariffs), and CE conformity test reports to ensure rapid Indonesian customs clearance.
Can TMB custom-manufacture non-standard window sizes or primary input ratios?
Yes. As a direct manufacturer in Liushi, Wenzhou with dedicated toolmaking and coil-winding workshops, we support OEM/ODM projects. Whether your project involves atypical primary currents (e.g., 75A, 150A, 800A), rectangular window profiles for dual parallel copper busbars (up to 120×80mm), millivolt/milliamp outputs for IoT microcontrollers, or private customer labeling on outer casing prints, our engineering department can customize configurations with low initial sample MOQs starting from 5 pieces.

Upgrade Your Palembang Energy Infrastructure

Connect directly with Zhejiang TMB Electric's export engineering division. Submit your feeder dimensions, primary amperage requirements, and target switchboard schematics for an immediate competitive quote and full technical datasheets.

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