S Series In-Cabinet Three Phase Single Output Substation UPS

S Series In-Cabinet Three Phase Single Output Substation UPS (5kVA~10kVA)

Product Positioning

      Cabinet-embedded frequency UPS exclusively designed for embedded installation inside integrated secondary control cabinets within substations and power plants (In-Cabinet Type), three-phase mains input + single-phase AC output, limited maximum 2-unit parallel design. Clearly differentiated from large floor-standing SDL UPS and Off-Cabinet Type S series standalone cabinet UPS models.

      Terminology Note: In-Cabinet Type means the UPS is designed for embedded installation inside integrated secondary control cabinet within substation main building, not for standalone separate cabinet deployment.

Valid Model List

     1.5kVA: No DC110V/DC220V optional mass-produced models

     2.8kVA: DC220V Standalone/Parallel: S108ADW

     3.10kVA: DC220V Standalone/Parallel: S110ADW

Note: DC110V version is unavailable for all power ratings of this series

Core Structure Spec

Overall dimension: 426×470×576mm, standard embedded cabinet installation, two panel opening sizes for matching different secondary integrated cabinet body

1. Product Introduction

      Different from general commercial IT UPS and large-capacity floor-mounted power UPS, this in-cabinet three phase single output substation UPS targets the dedicated power demand of indoor secondary protection integrated cabinets in power facilities. It adopts classic power frequency dual-conversion topology, built-in primary-secondary isolation transformer to suppress grid surge and harmonic noise.

      This in-cabinet three phase single output substation UPS supports AC380V three-phase mains + DC220V station battery dual input, outputs stable 220V pure sine wave power for relay protection, RTU and cabinet communication equipment. The parallel limit is set to maximum 2 units for small-capacity cabinet capacity expansion, equipped with DSP full digital control, customizable soft start and bypass switching logic, RS485 Modbus communication + 6 dry contacts for SCADA three-remote management, fully complying with DL/T 1074-2019 power industry testing standards.

2. Core Competitive Advantages

2.1 Power-grade Isolation Design for Substation In-Cabinet Scenarios

      Wide input voltage & frequency tolerance reduces battery charge-discharge cycles to extend battery service life; built-in isolation transformer cuts common-mode interference from substation grid. Strong overload & short-circuit resistance ensures stable operation under harsh indoor grid fluctuation. Independent heat dissipation structure lowers cabinet internal temperature rise and dust accumulation, improving long-term running stability of this in-cabinet three phase single output substation UPS.

2.2 Small-scale Parallel & Flexible Start-up Configuration

      Masterless parallel architecture supports up to 2 units with current sharing imbalance ≤±5%, meeting small secondary cabinet capacity upgrade demand. Bypass priority can be set by users, transfer time controlled below 4ms; soft start parameter adjustment suppresses inrush current during cold start, supporting full-load instant startup.

2.3 Complete Protection & Standard Power Monitoring

      Local LCD + indicator lights for on-site patrol inspection; RS485 Modbus and expandable dry contacts upload operation data and fault alarm to substation centralized platform. Full over/under voltage, over temperature, short-circuit protection covers AC input, DC input, inverter output and bypass loop.

2.4 Strict Compliance with Global Power Tender Standards

      All electrical indicators follow DL/T 1074-2019, low leakage current design, wide temperature & humidity adaptability, clear altitude derating rule for plateau substations, complete test documents available for overseas EPC bidding.

3. Global Target Application Scenarios

     1.Backup power for relay protection integrated cabinets inside urban & rural main substations

     2.Power supply for secondary automation panels of small thermal/hydropower stations

     3.Indoor cabinet UPS for grid renovation EPC project secondary control units

     4.Unattended substation communication cabinet stabilized power supply

     5.Small-capacity three-in single-out power backup for power monitoring terminals

4. Full Model Parameter Specification Table

4.1 Universal Electrical Parameters

Overall Index

   ● Max parallel quantity: 2 units, current sharing imbalance ≤±5%

   ● Dimension(WDH):426470576mm

   ● Input power factor ≥0.95, total leakage current ≤3.5mA

   ● Dry contact: half group 3DI+3DO, full group 6DI+6DO

   ● Monitoring: LCD + LED indicator, RS485 Modbus, 6 dry contacts, three-remote function

AC Input

      Input voltage: AC220V(-15%~+20%); Frequency:50Hz±10%; Voltage THD≤10%; Single harmonic current ratio≤30%

DC Input

      Voltage: DC220V/110V (operating range 80%~120%); Ripple factor ≤0.5%; Starting inrush current ≤150% rated current

AC Output

      Output voltage AC220V tolerance ≤±1%; Frequency 50Hz tolerance ≤±0.2Hz; Dynamic voltage deviation ≤±5%; Recovery time＜10ms; Sync precision ≤2%; THD linear load≤3%, nonlinear load≤5%

Bypass

      Bypass input AC220V; Transfer time＜4ms

Overload Protection Logic

      Load≤105%: continuous operation; 105%~125%: max 10min runtime; 125%~150%: max 1min runtime; ＞150%: switch to bypass immediately

Environment

      Operating temp:-10℃~+45℃; Storage temp:-20℃~+60℃; Humidity daily avg≤95%, monthly avg≤90% @40℃ non-condensing; Full-load operation up to 3000m altitude, derate 1% per 100m elevation

5. Optional Project Accessories for Operators

     1.Custom adapter plates for international standard substation integrated cabinets

     2.UPS centralized SCADA monitoring software

     3.Extended dry-contact alarm junction box

     4.Spare monitoring display module

6. FAQ for Global EPC Partners

Q1: What is the difference between this In-Cabinet Type UPS and Off-Cabinet Type S series UPS?

A1: This in-cabinet three phase single output substation UPS is designed for embedded installation inside main building integrated secondary cabinets with maximum 2-unit parallel limit; the Off-Cabinet Type is developed for independent separated cabinets, supports more parallel units, with different installation scenarios and electrical tuning.

Q2: Why 5kVA has no available model?

A2: This series only launches 8kVA/10kVA DC220V versions for actual mainstream substation project demand, 5kVA & DC110V specifications are not mass-produced.

Q3: Can it connect with substation SCADA automation system?

A3: Standard RS485 Modbus RTU and dry contacts support direct docking with mainstream power monitoring platforms.

Q4: What is the efficiency data of this UPS?

A4: AC mains working efficiency ≥93.5%, DC inverter working efficiency ≥86%.

Q5: Can we apply this model for international power tender projects?

A5: It meets DL/T 1074-2019 standard, we can provide full compliance test reports for tender documents.

7. Download & After-sales Terms

Download Files

     1.S Series In-Cabinet 3In 1Out Frequency UPS English Datasheet

     2.Cabinet Opening Dimension Drawing & Wiring Manual

     3.Full Industry Compliance Certification Reports

Global Warranty

   ● 3-year global warranty for main unit

   ● Remote technical support for overseas project commissioning

   ● OEM labeling & parameter adjustment for EPC contractors