Chint DTSU666-CT
Description
Precision magnetic core for wide dynamic load accuracy.
Chint BH-0.66 30I 200/5 is a 200/5 A high-precision Class 0.5S solid-core current transformer with a 5 VA burden rating, engineered to step down commercial three-phase service currents for Chint DTSU666-CT and GoodWe GM330 commercial smart meters.
200/5 A Transformation Ratio
Steps down primary currents up to 200 A into standard 5 A secondary signals for commercial energy meters and protection relays.
Class 0.5S High Precision Standard
Meets strict IEC 61869-2 accuracy requirements across wide dynamic load ranges, even under light commercial loading.
5 VA Rated Burden Capacity
Supplies strong signal output to drive secondary wiring loops without phase-shift or amplitude degradation.
Flame-Retardant Busbar/Cable Mounting
Accommodates solid copper busbars up to 30 × 10 mm or cables up to 22 mm diameter with rugged flame-retardant casing.
More product details
Standard commercial current transformers lose measurement precision below 20% load, causing inaccurate zero-export throttling. The BH-0.66 30I features a specialized silicon-steel magnetic core certified to Class 0.5S.
- Delivers certified Class 0.5S precision across 1% to 120% of rated nominal current.
- 5 VA burden allows running secondary wiring leads to distant meter enclosures without accuracy loss.
- 0.66 kV dielectric insulation rating ensures safety on 400 V commercial distribution systems.
Rugged busbar clamping with dual screw-lock terminals.
Installing CTs in crowded commercial switchgear requires secure mechanical mounting that prevents vibration-induced shifting. 30 × 10 mm central window accepts flat copper busbars or heavy cables up to 22 mm diameter. Integrated busbar clamping screws lock the transformer securely in place. V0 flame-retardant polycarbonate housing operates reliably from -5 °C to +40 °C.
Solid core: it goes on with the cable
The conductor threads through the window as the run is made, and once the transformer is on there is nothing to clip, latch or re-close over its service life. It fastens to a plate or straight onto the busbar, vertical or horizontal, wherever the incomer already runs.
Class 0.5S at its rated 5 VA
0.5S is the precision the meter above it can actually reach, and 5 VA is the budget the whole secondary loop runs on - the transformer's rating and the installation's quality are the same number seen twice.
660 V class, 50 and 60 Hz
Rated for low-voltage distribution up to 660 V, working from -5 to +40 °C below 80% humidity and 1000 m altitude - a main cabinet device, sized for the boards these feeds actually live in.
Technical data
Precision current step-down engineered for commercial switchboards, solar feed-in metering, and peak shaving.
200/5 A commercial current transformer with Class 0.5S high metering precision.
Designed for commercial electrical distribution boards and solar interconnection points, the BH-0.66 30I transforms primary currents up to 200 A into standard 5 A secondary signals. With Class 0.5S accuracy and a 5 VA rated burden, it provides clean, precise measurement for Chint DTSU666-CT and GoodWe GM330 commercial smart meters.
- Ratio
- 200/5 A
- Precision
- Class 0.5S
- Burden Power
- 5.0 VA
- Window Size
- 30 × 10 mm
Model & Type
- Brand
- Chint (Zhejiang Chint Instrument & Meter)
- Model
- BH-0.66 30I, wound 200/5 A
- Type
- Low-voltage current transformer, solid core
- Accuracy class
- 0.5S (200/5, 5 VA)
Electrical
- Rated primary current (A)
- 200
- Rated secondary current (A)
- 5
- Rated burden (VA)
- 5
- Rated voltage (V)
- 660
- Frequency (Hz)
- 50 / 60
- Primary turns
- 1
Mechanics
- Window
- Ø 23 mm
- Dimensions (H×W×D, mm)
- 80 × 60.5 × 33
- Mounting
- Plate or busbar, any orientation
Environment
- Operating temperature (°C)
- -5 ~ +40
- Relative humidity
- < 80%
- Altitude (m)
- ≤ 1000
Project fit
Where this model fits.
Scenarios that show which projects the Chint BH-0.66 30I 200/5 belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Commercial Solar & Hybrid Inverter Metering (100 A to 200 A Service)
Commercial switchboards with main service ratings between 100 A and 200 A installing a Chint DTSU666-CT or GoodWe GM330 smart meter.
200/5 A ratio matches 100–200 A commercial service lines perfectly.
- BoundaryIf the service exceeds 200 A (e.g. 400 A, 600 A, 800 A, 1000 A) or existing busbars cannot be disconnected for installation, step up to the MBS KBU-58 split-core series. ---
What Linker confirms with you
- If the service exceeds 200 A (e.g. 400 A, 600 A, 800 A, 1000 A) or existing busbars cannot be disconnected for installation, step up to the MBS KBU-58 split-core series. ---
Documents
Chint BH-0.66 current transformer series datasheet (ES) Chint BH-0.66 Current Transformer Datasheet (ES)Product questions
How many CTs are required for a three-phase system?
3 current transformers (one for each phase: L1, L2, L3). Measuring a three-phase electrical panel requires 3 units of the BH-0.66 200/5 A CT, installed with identical orientation (P1 facing the grid side, P2 facing the load side).
System components
Required components
Chint DTSU666-CT smart meter
Item number: DLK-CHINT-DTSU666CT
BH-0.66's 5 A secondary matches the DTSU666-CT's required external-CT interface (3× /5A CTs, not included with the meter).
