BD-100
Current limitation reactor for TSM thyristor modules, BD series · EPCOS AG / TDK Electronics
The BD-100 is a single-phase current limitation reactor from the EPCOS / TDK Electronics BD series, and it is what makes a thyristor module survive in a compensation system that has no detuning reactors. Switching a capacitor onto the network produces a current that rises extremely steeply, and a thyristor has a hard limit on how fast its current may rise. The BD-100 sits in the branch and holds that rate of rise, dI/dt, inside the value the thyristors can take. Two units per step are required. Where the system already has detuning reactors, those limit dI/dt themselves and the BD is not needed.
Key Features
- 01Single-phase current limitation reactor for TSM thyristor modules in dynamic compensation systems without detuning reactors
- 02Limits the rate of current rise, dI/dt, in the thyristors to the maximum permissible value
- 03Protects the thyristor switch — two units per step are required
- 04Nominal current 85 A, linear to 120 A, inductivity 0.1 mH
- 05Copper bus bar connection; continuous operation up to +80 °C
- 06Compact and light: approx. 2.3 kg
Applications
- Low Voltage Reactive Power Compensation SolutionsIn industrial and commercial facilities the reactive power balance can be upset both by inductive loads such as motors and transformers and by loads with a capacitive effect such as UPS systems, drives and long cable runs. This can disturb the reactive power balance, move the power factor away from the desired level, draw unnecessary current from the network, increase losses and incur reactive energy charges. Low voltage compensation systems hold the power factor at the desired level by providing compensation matched to the facility's inductive or capacitive reactive power demand. Where load changes are rapid, thyristor-switched systems are used to respond quickly to reactive power variation. In facilities where harmonics are present, compensation systems with harmonic filter reactors are applied to keep the capacitors from entering resonance with the network. A correctly engineered compensation system helps to avoid reactive energy charges, to use transformer and cable capacity more effectively, to reduce electrical losses and to improve system performance.
- SVC and STATCOM SolutionsSVC and STATCOM systems provide dynamic reactive power compensation and voltage control in facilities where reactive power demand changes rapidly and continuously. They are effective above all in applications where the response time of conventional compensation systems is not sufficient. SVC systems work with thyristor-controlled reactive power elements, while STATCOM systems, built on power electronics converter technology, respond very quickly and can provide effective reactive power support even at low network voltages. In applications with rapid load changes such as arc furnaces, rolling mills, large motor loads and renewable energy plants, they help to reduce voltage fluctuation and flicker as well as controlling reactive power. SVC and STATCOM solutions are designed specifically for each project, evaluating the facility's power demand, load characteristic, network structure and power quality measurements. With the right system selection, voltage stability is improved, reactive power flow is brought under control and the facility's adverse effects on the network are reduced.
Technical Specifications
BD-100
| Ordering code | B44066T0100L400 (per the PFC Product Profile 2025, page 73) |
|---|---|
| Type | BD-100. Series sibling BD050, 50 A, B44066T0050L400 — produced to order |
| Nominal voltage | 400 … 480 V |
| Nominal current | 85 A |
| Linearity | 120 A |
| Inductivity | 0.1 mH |
| Frequency | 50 / 60 Hz |
| Losses at nominal current | 26 W |
| Connection | Cu bus bar, 2-pole (25 mm / D8) |
| Mode of operation | Continuous |
| Max. operating temperature | +80 °C |
| Weight | Approx. 2.3 kg (the photographed type plate reads 2 kg — see Notes) |
| Dimensions | a1 70, a2 50, a3 5, b1 77, b2 64, b3 8, c 86, d approx. 45 mm |
| Mounting | On a mounting plate, vertical; minimum 50 mm distance from other assembly groups |
| Used with | TSM-LC-I, TSM-LC10, TSM-LC-N, TSM-LC-S, TSM-LC100, TSM-HV50 — two units per step in systems without detuning reactors |
Technical values are taken from the manufacturer's published documentation. Confirm against the current datasheet before ordering.
Downloads
Datasheets, manuals and technical documentation are available from the manufacturer's document centre, or on request from us.
Technical sources
- www.tdk-electronics.tdk.com/download/174004/af7615a46f93c0fa639ca0b108748f46/pfc-katalog-pp.pdf
- www.tdk-electronics.tdk.com/inf/20/50/ds/B44066T_E400E480.pdf
- www.tdk-electronics.tdk.com/en/530340/products/product-catalog/components-for-power-factor-correction-and-harmonic-filtering/product-overview/thyristor-modules-tsm
- www.tdk-electronics.tdk.com/download/187622/c6451d69933b2ca173b6da52d9039e77/pdf-installationandmaintenanceforthyristormodules-tsm-lc.pdf
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