CSP Pole-Mounted Transformer
Completely self-protected single-phase units with built-in fuse and arrester, mounted directly on the pole.
10 – 100 kVADistribution Transformer Manufacturer — Indonesia
Distribution transformers, precision-built in Indonesia
PT. Mastra Mulia Mandiri manufactures MONTANA oil-immersed and dry-type distribution transformers from 10 to 5,000 kVA, built to IEC 60076 and SPLN standards. A certified supplier to PT. PLN (Persero), and open to international procurement.
10–5000
kVA product range
1,500
Units/year capacity
Since 2019
PLN certified supplier
20+
Years team experience
Our Customers
Trusted by utilities and industry
A selection of the organizations we currently supply.
Product Range
The MONTANA transformer range
Distribution Transformer
Units for overhead and ground distribution across PLN, commercial, and industrial networks.
25 – 2500 kVA
Dry-Type Transformer
Cast-resin units for indoor and fire-sensitive installations — no oil, minimal maintenance.
160 – 2000 kVA
Medium Power Transformer
High-capacity units for large industrial plants, data centers, and major infrastructure projects.
2500 – 5000 kVA
Mobile Substation (UGB)
Trailer-mounted substation for rapid deployment, events, and emergency power supply.
200 – 1000 kVAWhy MASTRA
Why choose MASTRA
Built on a team with 20+ years in transformer manufacturing — precision winding, an in-house testing laboratory, and pricing that competes with the largest makers.
Get in touch
Let's discuss your requirements
Send us your specifications and we will respond within one business day. International and export inquiries are welcome.
Jl. Cikukang (Holis) No. 44, Cigondewah Kaler, Bandung Kulon, Bandung 40214, West Java, Indonesia
WhatsApp available for international inquiries
Mon–Fri, 08:00–17:00 WIB (GMT+7)
Certified operations
ISO 9001ISO 14001SMK3PLN CSMS