Toshiba TOSBERT S7 series frequency converter

2. Environmental conditions limitations

Temperature: Operating environment temperature -10 ℃~40 ℃ (up to 50 ℃ for models without casing); Storage temperature -20 ℃~60 ℃; When the temperature exceeds 40 ℃, for every 1 ℃ increase, the rated output power decreases by 1% (up to a maximum of 50 ℃).

Humidity: Relative humidity ≤ 90% RH, no condensation (dehumidification devices or anti condensation heaters need to be installed in condensation environments); Avoid using in high humidity, foggy, and salt spray environments (anti-corrosion models should be selected for special environments).

Altitude: ≤ 1000m (for every 100m increase in altitude, atmospheric pressure decreases by approximately 1kPa); When it exceeds 1000m, the rated power usage needs to be reduced (such as 5% reduction at 1500m and 20% reduction at 3000m).

Vibration: During operation, the vibration acceleration is ≤ 0.6G (10-50Hz), and the amplitude is ≤ 0.08mm (50-150Hz); Exceeding the range requires the installation of a vibration reduction base, otherwise it may cause loose terminals and damage to capacitors.

Other: No flammable or explosive gases, no corrosive gases, no large amount of dust (IP40+dust cover should be selected for dusty environments); Stay away from strong electromagnetic interference sources (such as welding machines and high-voltage transformers), with a distance of ≥ 2m.

3. Transportation and storage precautions

Transportation: it shall be fixed in the special packing box during transportation, and the packing box shall be filled with cushioning materials (foam, pearl cotton); Do not invert or flip over to avoid severe collisions (which may cause damage to internal IGBT modules and capacitors); Transportation temperature -20 ℃~60 ℃, avoid direct sunlight exposure.

Storage: Long term storage (≥ 6 months) must meet the following requirements: temperature -20 ℃~40 ℃, humidity ≤ 60% RH; power on once a month (no load, voltage gradually increases from 0 to rated value for 30 minutes), activate the capacitor, and prevent electrolyte aging; Cover with a dust cover during storage to prevent dust from entering the ventilation openings.

Wiring specifications and hardware configuration

1. Main circuit wiring (detailed explanation by power segment)

The wiring of the main circuit directly affects the safe operation of the frequency converter, and there are significant differences in the configuration of terminals in different power ranges. It is necessary to strictly follow the instructions for operation:

(1) 200V level (0.4-75kW) main circuit terminal

Terminal identification function wiring requirements cable specifications (copper core)

Three phase power inputs of R/L1, S/L2, and T/L3 (single-phase models only connect R/L1 and S/L2) require a series circuit breaker (MCCB) with a capacity of 1.2-1.5 times the rated current of the frequency converter; Prohibit connecting power factor compensation capacitors 0.4-1.5kW: 1.5mm ²; 2.2-7.5kW：2.5mm²； 11-75kW：4-16mm²

U. The output of the V and W three-phase motors corresponds to the U, V, and W terminals of the motor, and the forward and reverse rotation of the motor can exchange any two phases; The cable length is ≤ 50m (thicker cables or additional output reactors are required if exceeding), consistent with the specifications of the input cable

PE protection grounding meets Class 3 grounding requirements, with a grounding resistance of ≤ 10 Ω; The grounding wire should be independent of the power grounding, and it is forbidden to share the same wire diameter with the neutral wire. The wire diameter should be ≥ 1/2 of the input cable diameter, and the minimum should not be less than 2.5mm ²

B1 and B2 brake resistors/brake unit connection power ≤ 15kW can be connected to built-in brake resistors; Power greater than 15kW requires an external braking unit to be selected according to the braking power, ≥ 2.5mm ²

(2) 400V level (0.75-630kW) main circuit terminal

Power ≤ 37kW: The terminal configuration is similar to that of 200V level, with the addition of "input reactor terminals (L1R, L2S, L3T)", which can be optionally equipped with input reactors to suppress harmonics.

Power ≥ 45kW: The terminals are divided into "main power input (L1, L2, L3)" and "output (U1, V1, W1)", and some models support dual power input (redundant design); The brake terminals are divided into "B1, B2 (main brake)" and "B3, B4 (auxiliary brake)", suitable for high-power braking requirements.

(3) High voltage level (6.6kV/11kV) main circuit terminal

Using high-voltage dedicated terminals (ceramic insulation material), divided into "high-voltage input (U, V, W)", "high-voltage output (u, V, W)", "grounding (PE)", "lightning arrester interface (LA, LB, LC)";

It is necessary to connect high-voltage lightning arresters and high-voltage reactors externally, and the wiring must be operated by high-voltage electricians, strictly following high-voltage safety regulations (such as measuring insulation resistance ≥ 1000M Ω after wiring).

2. Control circuit wiring (anti-interference+functional adaptation)