R46/2012-A-CN2-26.07
OIML CERTIFICATE
ISSUED UNDER SCHEME A
OIML Issuing Authority Name: National Institute of Metrology, China Address: No.18, Bei San Huan Dong Lu, Chaoyang Dist., Beijing, P. R. China Person responsible: Mr. Li Wentao
Applicant Name: Holley Technology Ltd.
Address: No.181 Wuchang Avenue Yuhang District,Hangzhou, P.R.CHINA
Manufacturer Name: Holley Technology Ltd.
Address: No.181 Wuchang Avenue Yuhang District,Hangzhou, P. R. China
Identification of the Three-phase smart meter DTSD545 Model:H310-DT certified type $ \textcircled{1} $ $ 3\times220/380\mathrm{V} $ 0.25-5(100) A 50 Hz $ \textcircled{2} $ $ 3\times220/380\mathrm{V} $ 0.5-10(100) A 50 Hz $ \textcircled{3} $ $ 3\times230/400\mathrm{V} $ 0.25-5(100) A 50 Hz $ \textcircled{4} $ $ 3\times230/400\mathrm{V} $ 0.5-10(100) A 50 Hz $ \textcircled{5} $ $ 3\times240/415\mathrm{V} $ 0.25-5(100) A 50 Hz $ \textcircled{6} $ $ 3\times240/415\mathrm{V} $ 0.5-10(100) A 50 Hz (Further characteristics on page 2)
This OIML Certificate attests the conformity of the above identified type (represented by the sample(s) identified in the OIML type evaluation report) with the requirements of the following Recommendation of the International Organization of Legal Metrology (OIML):
OIML R46 - Edition 2012
For accuracy class: Class B (Class 1)
This OIML Certificate relates only to metrological and technical characteristics of the type of measuring instrument covered by the relevant OIML Recommendation identified above.
This OIML Certificate does not bestow any form of legal international approval.
Important note: Apart from the mention of the Certificate's reference number and the name of the OIML Member State in which the Certificate is issued, partial quotation of the Certificate and of the associated OIML type evaluation report(s) is not permitted, although either may be reproduced in full.
OIML Issuing Authority:
National Institute of Metrology, China
Date: 27 May 2026
OIML Issuing Authority, China
中国OIML证书发证机室
Li Wentao
Director
National Institute of Metrology, China
| OIML Member State | OIML Certificate No. |
| P. R. China | R46/2012-A-CN2-26.07 |
The conformity was established by the results of tests and examinations provided in the associated OIML type evaluation report:
No. TER-R46/2012-CN2-26.07 dated 27 May 2026 that includes 16 pages and the associated OIML test report:
No. SIMT2026F14-41-004 dated 20 April 2026 that includes 111 pages
OIML Certificate History
| Revision No. | Date | Description of the modification |
| 0 | 27 May 2026 | Initial issue |
Characteristics of the Instrument
| Meter type(electromechanical/static): | static |
| Accuracy class: | Class B(Class1) |
| Nominal voltage, $U_{\mathrm{nom}}$: | $3\times220/380\mathrm{V},3\times230/400\mathrm{V},3\times240/415\mathrm{V}$ |
| Nominal frequency,$f_{\mathrm{nom}}$: | 50Hz |
| Maximum current,$I_{\mathrm{max}}$: | 100A |
| Transitional current,$I_{\mathrm{tr}}$: | 0.5A,1A |
| Minimum current,$I_{\mathrm{min}}$: | 0.25A,0.5A |
| Starting current,$I_{\mathrm{st}}$: | 0.02A,0.04A |
| Connection mode(phases,wires,elements): | Direct-connectedThree phases four wires,three elements |
| Direction of energy flow/registers: | Two-register,bi-directional |
| Register multiplier: | 1 |
| Meter constant: | 1000imp/kWh |
| Specified clock frequencies | 32.768kHz |
| Indoor/Outdoor: | Indoor |
| IP Rating: | IP54 |
| Terminal arrangement(e.g.:BS,DIN): | DIN |
| Insulation protection class: | II |
| Lower specified temperature: | -40 $^{\circ}\mathrm{C}$ |
| Upper specified temperature: | +70 $^{\circ}\mathrm{C}$ |
| Humidity class: | H1 |
| Tilt/Mounting position: | Any position is allowed |
| Hardware version(s): | H310-AA1-01-M03 |
| Software version(s): | Version:HMS3XX25121G5G000096400251121110Checksum:B02F8E58 |
Remarks:
Communication interfaces: 1 optical port, 1 RS485 port